Best beginner tips?

IMO League can be worth getting in to, but MOBAs like LoL and DotA2 can have very toxic communities. That being said I think you should give it a shot and play a bunch of bot games, see if you like it. If you do you can just find a friend group that isn't toxic to play the game with and enable a setting that automatically mutes the enemy team :)That way you don't have to deal with toxic users.