I'd stop being afraid of making mistakes and make an effort to try new things.
I'd learn to scuba dive and speak new language.
I'd do things I enjoyed, even if I wasn't good at them. like playing the piano.
I'd continue with my lessons and wouldn't give up because I wasn't all that good.
I would enjoy what I couldn't do. Yes, I'd still be competitive - I wouldn't want to change that but I wouldn't get upset if I didn't win.