I think old age is in each one's head; so if you're happy doing what you love, you're going to be young.
I always tell girls who say they want to start a band but don't have any talent, well, neither do I. I mean, I can carry a tune, but anyone who picks up a bass can figure it out. You don't have to have magic unicorn powers. You work at it, and you get better. It's like anything- You sit there and do it every day, and eventually you get good at it.