Well there is alot to learn. and given the amount of people that use smurf accounts it's hard to grasp certain concepts because you are simply outskilled. my advice is to pick a champion and stick with them and that lane specifically until you understand the core concepts of the game. personally i suggest picking illaoi or yorick and watching DirtyMobs on youtube cause he is really relaxed and will thoroughly explain how to play the game and why he does what he does.