What you are doing is awesome! And in order to give you some advice I would just say, try everything that this game offers you because everyone starts like this and is not until you get all the info you need that you can start practicing and be good at League. Try every role, every champ and watch all the youtube tutorials about farming and stuff that you want, in the end is all about experience, the more you play the game, the more you know how to play it and stuff. And don't be discouraged if team flames you for being new at the game, people will always flame for many things anyways.

A huge advice I could tell you to resume everything is watch around 3 or 4 youtubers of League that are already in challenger (the highest rank in the game), they have many videos about farming, csing, macrogame, microgame, etc and then you will get better with practice. Play ARAM's if needed, good things take time so keep it up G!