I got some great tips, number 1 priority is pathing, second is confidence, third is not dying to a laner (Dying to your enemy jungler is bad too but never ever feed a lane, even if you're getting first blood, trying to carry, you sabotage yourself)
Third is smoke a bowl and hop in practice mode, the just play around with the champ you like seeing what paths are fastest, try to get your first gank at about 3ish minutes if you can or before 4 and a half minutes at the latest, even if nothing comes of it, it puts the enemy team in a mindstate of "Oh fuck really he's ganking me?"
figure out who has the most to bring to the table on your team, that's a mixture of the champ and the player, if your best player is your support and the worst is your varus, try to get that support strong enough to carry lane for the adc, you dont have to camp specifically, just gotta stay communicative.
Don't let yourself fall for a trap lane: a trap lane is a lane tht's too far lost to salvage for an effective amount of gold Let's say there's a malphite top on your team, and the enemy team has a yasuo, and he's 6/0/3 because of roams and just recking the malphite (With good farm to boot) You should try use that to your advantage the best you can, enemy jungle might appear to try to steal that tower, which means maybe you can get mid to four man bot lane.
Everything is about the gold trade, and everything you do is for your team, yes you should have kills, but don't forget to leash as many as you can without hurting yourself. If you think ahri needs the double when you countergank, give her both, even if you're yi. Really pay attention to what's open and who's missing, where are the wards?
Also from what i hear the higher elos just get smitestone instead of red or blue smite, vision op yo