welcome.imo start out with learning a very simple song,play that song till its locked in ur head.then learn another,then another.take it slow,u dont have too learn a song in one day,break it up piece bye piece.dont worry about theory,that will come much later just have fun.if its not fun,but it down.best of luck.i think you are at a good place too learn.and there is the core system,good place to start.but get a few easy songs too play.