Since you are new to the game, don't worry so much about losing/people raging. If you aren't a level 30, you haven't been playing the game for long. No one should expect a pre-30 to be a Master rank player unless they specifically say that they are a smurf. My first few normal games my team basically did nothing but rage at me and each other for not doing what they thought we should do.
First thing first is learn the meta.
- Top lane is normally a Tank/Bruiser who has high health and resistances with generally few damage items.
- Mid lane is normally the APC or assassin of the team. Normally they only have 1 or 2 defensive items but the rest is damage. AP characters build ap, cooldown reduction (CDR), and magic pen.
- Bot lane is normally the only lane that consists of 2 players: an ADC and a support.
- ADC is generally a marksman who does consistent damage through auto attacking. They build mostly attack speed, attack damage, crit, and armor pen.
- Support is basically the position that is always underfed. This player generally doesn't take minions unless no one else is in lane. They generally don't take kills unless no one else can get the kill. Normally they build support items that either buff up the team or debuff the other team. If they are a tanky character, they may build some health/resistance items. If they are an AP character, they may build some AP, cooldown reduction (CDR), and magic pen.
- Jungle is a special type of position. This player is meant to be a roaming threat. Laners focus on killing the lane minions. The jungler kills jungle camps and uses the buffs from the camps. They take Smite, which does a lot of damage to jungle camps, the major ones being Dragon, Rift Herald, and Baron. Junglers may also come to a lane to help their team try to get a kill on the enemy laner.
Second is learn to last hit (AKA CSing or Creep Score or farming). Last Hitting is the most important thing in the game, learn it early. It doesn't matter if a target has 2000 health and I take out 1999, if you do just that last 1 hp, you get the credit for the kill. That is what decides things in this game. It is also what will give you most of the gold per match. Based on your match history, you need to practice that. Don't just let your character auto the minions constantly, cause you will most likely miss dealing the last hit. Try to attack only when the minion is about to die, that way you kill it and are awarded the gold for that kill. Consider playing a custom game with no bots and just CS for the first 5-10 minutes and then quitting. Try to perfectly last hit an entire wave of minions. I think it's about 100 minions at 10 minutes. I don't remember the exact numbers, but I believe getting perfect CS gives you enough gold at 10 minutes to almost get a full 
, which is one of the most expensive items in the game.
Also learn to manage a wave of minions. Again, CS is the most important thing early in the game. If you can kill more minions than your lane opponent, that means you will have more gold, thus more items, thus a bigger advantage. Learning things like denying CS, pushing a wave, freezing a wave, etc is important. Let's define a wave. When the game starts, minions are spawn and both sides collide in the middle of the lane, half way between each tower. The spawning minions is generally a "wave of minions." However, what we need to be concerned with for pushing and freezing waves is this colliding point.
Pushing a wave is killing enemy minions faster than your friendly minions are being killed, generally by using an ability or autoing minions. If I attack the minions but my opponent doesn't, that's me pushing the wave. Eventually their minions will die and my minions will move up in lane until they collide with a tower, the enemy laner, or the next set of minions.
The reasons you push a wave are:
- You want to get to a level faster than your opponent, thus giving you more available abilities/damage than them which means more kill potential for you (rushing level 2 for instance or getting level 11 for that second point in ult)
- You opponent isn't in lane (recalled, roaming, or died), so you want to deny them CS by letting your minions die to the tower which is the quickest way to have friendly minions die
- You want to leave lane (recall, roam, or get an objective like another lanes tower/inhib/dragon/baron/rift herald) without worrying about losing too much CS or your towers being under threat while doing it
- You want them to farm under tower in hopes that they miss CS
You want to be careful about pushing a wave though because:
- It leaves you susceptible to ganks from the enemy jungler because you are further away from your tower
- Your enemy laner has a longer distance to attack you because you are away from your tower
- Your enemy laner is safer because they are close to their tower
- You may miss CS if you are constantly pushing.
Freezing a wave is trying to let the minions die at the same rate (while last hitting), thus keeping the colliding point in the same spot. If you are the only person in lane and you only last hit the minions, the collision point will mostly stay in the same spot.
The reason to freeze a wave are:
- You are weaker than your laner, thus freezing near your tower allows you to farm safely to catch up
- You are stronger than your laner, thus freezing near your tower allows you to farm safely while positioning yourself to deny CS from your enemy laner (AKA zoning)
- You are building up a large wave of friendly minions so you can take an objective while that wave naturally pushes (AKA slow pushing)
You want to be careful about freezing a wave because:
- You are stationary, thus easier to kill.
- You are visible on map, thus giving them more information about what your team is/isn't doing.
- You aren't applying pressure (threatening to take a tower), thus allowing them to roam to other objectives.
- The enemy can come push the wave (AKA break the freeze) and get to your tower more easily.
Denying CS is causing your friendly minions to die to something besides your enemy laner. They can die to the enemy tower or to the enemy minions, both ways prevent your opponent from getting the gold. If the enemy laner isn't in lane, then they miss out on both the gold and the experience from the minion death, both bonuses for you. You use the idea of pushing waves, freezing waves, and zoning to deny CS.
Eventually you will be good enough at last hitting to learn how to read your minion wave while still getting most of the minions. With this knowledge you can:
- See when the enemy will go to last hit which allows you to deal damage to them without taking too much if any damage in return (trading)
- See when they will level up first, giving you time to back off and avoid getting all in'd or taking a bad trade
- See when they are behaving oddly, thus anticipating a gank without vision of it happening
All this knowledge mostly just applies to the laning phase of the game, but it is crucial for surviving the early game with as much gold and fewer deaths.
Third thing is that playing against bots is NOT anything like playing against regular people. Even intermediate bots are too easy for me compared to people. Granted, they can still overwhelm if they target one person out, but they aren't going to flash crowd control (CC) lockdown someone like a normal team might. But, bots don't focus Dragon or Baron, which are big power spikes for your team. They also don't jungle, so your top lane will be 1v2, but they will be splitting the experience/gold and thus giving your team more of an advantage. They also don't gank really. I've never had a random bot wander into my lane and 2v1 me in bots. They may rotate to the losing lane, but they generally don't hardcore try to shut someone down.
Use bots to practice last hitting minions, trading in lane, learning abilities and cooldowns, understanding items, learning timers, understanding your champs power spike, dodging skill shots, landing skill shots, etc. Try every champion at least a few times so you know the basics of what each champion can do. Long ago, I played a game with a Braum support and had no clue about any of his abilities, which greatly hurt our ability to work together since I didn't know what was causing our enemies to get stunned randomly (Braum passive) or why my teammate kept telling me to "STOP RUNNING AWAY" when we got ganked and he got grabbed (one of his abilities allows him to jump to allies). I started playing ARAM for a while and that helped a lot cause it forced me to play champs I never would've picked and learn how they interact in a team fight.
Fourth is to figure out what places you enjoy playing. In your history, you play a lot of Ashe and Teemo. Ashe is normally an ADC and Teemo is generally a jungler or top laner. Being the ADC means you will be focused out in most games, so you have to play a lot more perfectly than most people. Getting gold and CS is most important for you since you'll build mostly damage items. Teemo can be played in many different ways though, so you can figure out what your team needs to fill in the gap.
Fifth is look up some guides on how to build characters. Ashe, for instance, normally you pick up a 
or 
first item, then get a 
, and then finish an . 
is a good item, but not as a first item.
Sixth is work on lowering your death count. Learning to play passively is a big part of the game. If you are ahead in gold/items vs your lane opponent, then don't be afraid to use that to make them fall behind more. But if they are ahead, play further back. It's better to give us CS and get experience than to give a kill and lose both gold and experience.
Focus on those things first, then worry about everything else. If you want, feel free to add me and I can give some more advice, but I'm not that great at the game yet so don't expect any expert level advice.
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because I loved to mobility and how tanky she could be built. Mind you im bronze so I dont expect you to listen to anything I have to say about playing tips (although I do have over 550 wins, I just dont play ranked much). I would just find someone who fits you play style, watch a few videos to learn tips and tricks and then just start jumping into games and practicing. Everyone had to start somewhere....
, 
, and 
are items that, while weak statistically have abilities that are really useful. In addition, they increase the base gold generation of the owner.
Gives you a unique passive that lets you execute minions at low health giving both yourself and one nearby ally the gold and credit for the cs.
