I feel this. I reached a level of success in my professional career that I was able to retire before 50. I had always been a music fan, but had made only very minor efforts to make music myself. When I had more free time, I made it a priority. I went through a time with the ukulele, then the guitar. I realized that I wasn't that interested in just making music for myself. I wanted to be part of an ensemble. I picked up the bass guitar with the goal of finding a group. I tried a few different things and after several years ended up in a retro-country band. It was a lot of fun, but I felt more and more that the group needed a standup bass, not a bass guitar. Finally, I decided I should bite the bullet and learn to play the upright, in spite of the sheer inconvenience of the thing! I was 60 years old. Reaching a certain level of competence has created lots of playing opportunities. I play 50s Nashville country, 40s western swing, gypsy jazz, 50s and 60s modern mainstream jazz, 40s and 50s pop standards with a singer, bluegrass once in a while. I try to say yes to every chance I get to play. That said, I consider myself just barely competent. I can keep time pretty well, I can follow a chart, play two-feel and bossa nova rhythms, walk comfortably on country tunes and with some effort on jazz standards. I'm terrible at memorizing songs, so I just make sure to always have good charts. I stay away from the higher reaches of the fingerboard. The bow mystifies me. I only solo when absolutely required. I find myself as a musician in almost exactly the opposite role from my professional career. I'm the guy in the back who keeps things grounded, not the star. Still, I get a lot of satisfaction out of it and I'm very grateful that I discovered this late in life.