That's really cool. It's really hard to self-teach and takes a lot of discipline. Some of the most talented musicians I've met though are self-taught (at least originally). Are you looking for a future career in music or entertainment?
And I have. Probably one of the bigger roles I had was RF Simpson in Singing in the Rain. In 2012 I also was part of an original puppet show with singing spiders, rats, a witch, and an evil General with a big blue head and beatboxing minions. Haha.