Alright. So basically what you want to do is play, all day, every day, and experiment with shit.
Personally I'd advise you to start by holding all and moving a few joints at a time, then starting to relax them one by one. Some better replay maker might come along and tell you that my method is absolute bullshit, and the best way to learn is to sacrifice a virgin at midnight.
Im not the greatest, so if anyone else has another method, you would probably be better off listening to them