If I knew at 15 what I know now, I would have never gotten baptized---which I did at 17. I would have gone to college and become a Social Worker, at the minimum with a Masters degree. I knew at a very young age that it was what I wanted to do. Instead, (with no degree, of course) the best I could do was work as a Counselor and Trainer at hospitals and nonprofit agencies. It was mostly satisfying work and my income was livable. I married at 19, but I would not have done so until around 30, and certainly not to the JW husband that I later divorced.
I wasted a lot of years as a JW, a lot of them just "passing time" and not accomplishing many of the things that I wanted to do. I'm now retired, with regrets of my losses, so I encourage you who still have the time to do so...to pursue your dreams while you can.