I started playing the ukelele in Hawaii as a little kid, and by age 10 was playing guitar, which I still play daily. I've taken the odd lesson here and there, but for the most part, I'm self-taught and learned most of what I know by watching and trying to imitate other players.
I've subsequently taught myself banjo and mandolin too over the years. I'm not that good, and have only written two songs in decades of playing, but I get immense joy from playing musical instruments nonetheless.
ADG