The best way to start playing/leaning a new champion

Play them in ranked. Don't real any of the abilities, just use them. Something gonna work right? Also, of you do feed, please don't play safe. Just keep fighting the fed enemy till you get a good strategy. Also, if you give up first tower and go 0/7 Draven, you're like, pretty much the diamond player I've been looking for to carry my games. Now, if this happens to make you lose, I'm sorry, but you have no idea how to play League then.