A C harp plays blues in the key of G as well as major-key "straight" tunes in C. If you have a blues-guitar-playing friend who is most adept in E (as is the case for so many), he/she can capo up three frets if you want to try playing along.

Ebbie, if I were you I'd wait a while and hold off before issuing me a "Good for you." I picked up the harmonica once, carried it around for years without getting anywhere, eventually quit, and haven't tried again since, at least not yet. Just because I can muse about maybe actually learning someday, if absolutely forced by circumstances, does NOT mean I'll ever actually follow through.