I'm with Spaw on the piano thing. I was able to teach myself several other instruments because of a secure grounding in keyboard education. That and an upbringing of choral singing and a very musical household while growing up.

Hands down, the best guitar students I have are also current or former piano students with at least 2 years of study. We really get down to business. I have a drummer taking guitar with me and he's got fabulous rhythm instincts, and an ear refined by exposure to music through his parents his whole life.

I knew about chords, scales, rhythms, and harmony before I ever got into guitar and then folk, rock, and blues music and I find it interesting that there are so many questions about these very subjects on this and other forums. I got lucky I guess.

Still, I wish I had more time to study...

Peace, Mike.