I agree learning the theory would be best, but just to play devil's advocate there have been MANY successful bands who made fantastic music without knowing any theory. I believe the Beatles didn't know any theory in the 60s but look at the marvelous music they made.
Still though, theory is the language of music and if you are serious about music, learning its language would be super beneficial.
Still though, theory is the language of music and if you are serious about music, learning its language would be super beneficial.


