Uke is easy as, they are cheap to buy, the chords marry up with slight adjustment to guitar and it's fun! You can google uke chords as well and free songs. NOt sure where you are but in Melbourne there is a place called African Drumming(google it) and they do night classes for adults. The kids at my school just did an 8 week program and it was FANTASTIC! I am doing the teacher training for it next year.