Mrrzy, Bonnie is exactly right when she says you need to be passionate about the instrument you choose to learn. That's really the key. I'm not sure I entirely agree with Alex about the piano. I think there are a lot of piano players who just picked it up and don't read music. As I remember my misspent youth, the kids who played from music could only play whatever boring music was in front of them but the kids who played by ear rocked and could play any rock & roll or boogie piece you wanted to hear. I don't think piano chords are necessarily harder to learn than guitar chords and theory is theory, you have to learn some chord theory no matter what instrument you choose.

Of course an autoharp is more easily carried but a guitar is more easily tuned. Whistles and pipes are pretty well out if you want to accompany your own singing.

Good luck,

      - Mark