I'm in the tiny minority that does not reccomend learning hardcore theory when you start out (unless that's what really interests you), so don't take anything I say as gospel but bear it in mind, it depends on the type of person you are and how you learn. Having an understanding of how music fits together is a good idea but having a good ear and a creative imagination is the more important.
First things first, get some lessons from an instructor who is into the music you like, learn some party tricks then take it from there.