That's so cool! :D I'm glad you were able to do that :3
I've never been taught how to read or write music properly, so I started out on keyboard and guitar just trying to play parts of stuff I liked by ear, haha. Even now, sometimes I will hum a tune that's in my head, but I don't actually know what the notes are, so I record myself humming before I forget the tune, then listen to it back and make a basic midi of it x3