Yes I had lessons from an American, here in Australia, (he became my soul-mate and husband so the lessons are free now) I also play guitar and a few other instruments but my voice is my main instrument. I find that I need to use different instruments for different stlyes of song. I am an impatient musician who wants to sing a song I've fallen in love with immediatly - so now I usually get my true-love to play accompaniment. If he's unavailable I can do basic styles myself. I find myself singing in - with banjo - G, D - (I love "graveyard tuning") and F usually, but the capo is a wonderous thing. If a song doesn't seem to work with banjo in a sensible key I switch to guitar giving me more scope with both range and style. Some songs seem best without accompaniment. It all depends on the song and how I hear it inside me. I did learn lots of tunings for banjo once but .... so many songs so little time....