Picking Up New Champions Gets Easier the More You Play and Why You Shouldn't Call Someone a Bronzie.
Picking Up a New Champ: To start you might find "mastering" (I don't think anyone can truly master any champ) a champion pretty hard. Learning how to play even the champions that seem most basic can be difficult to start. But those difficulties on simple champions really make it worth the effort to play them, and learn them. By playing these simple champions you're really just improving your mechanics (even if you think you have "mastered" them).
Take this game for example: http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/1794429751/214906406?tab=overview
I purchased Morgana a couple days ago just so I could have another support for ranked (I hate support). However, being a mid main I decided I should start by practicing her mid as I know how to play against many of the mid lane champs. The last time I played Morgana was well over 6 months ago when she was free, and I only played her one time. Morgana isn't a super difficult champion (however if you can't land bindings you really aren't all that useful) and she is a good champion against Annie because you can just spell shield the stun. That being said I still hadn't played her in over 6 moths, but because my mechanics are where they are I was able to carry (more or less) on a champion I have hardly ever played.
So some of you might get frustrated that you struggle when trying to learn a new champion because no matter what you do it just seems hopeless (you're feeding, losing lane, and all of that unpleasant stuff). If this is the case I recommend playing a champion you're comfortable with in whatever position you're trying to learn with the new champ. Go for a 1 to 1 or 1 to 2 ratio. Play a champ you're comfortable with 1 or 2 times so you can learn more mechanics and match ups and then play 1 game as the new champ using the skills you learned to improve your game with the new champion. Trust me it gets a lot easier.
Why You Shouldn't Call Someone Bronzie: I just finished my placements not too long ago. I won 3 of the 10 games and got placed in bronze 1 (pretty pleased because I didn't win many games and it's my first season). Anyway in the aforementioned game: http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/1794429751/214906406?tab=overview the enemy shyvana was really salty (we were winning pretty heavily). It wasn't long before she started calling me and my team bronzies (which I am... I am in bronze and my team was bronze or unranked). In other words she was saying I am bad and my team is bad, but if you're doing worse than a team of bronze players and calling them bronzies doesn't that mean you are worse than a bronze player? I don't understand why people need to call other people bronzies especially if they are behind. All you're doing is saying that you're worse than a bronze player. Rank isn't everything. The bronzie I am has beat gold players in lane (I'm playing at a silver 3 to silver 1 level).