I went to college despite the fact that I was a JW, however, every decision I made about what to spend time on went through a JW filter. So if I had not been a JW, I might have developed some other interests a little more and that might have changed my skill set some. But I don't know for sure how that would have affected my life jobwise.
I probably wouldn't have stuck with the no premarital sex rules of JW. I sometimes wonder whether I would have been mature enough to play safely. An unplanned baby or a STD can have very negative effects and will at least alter your planned path. But then I also wonder whether I would ever have gotten married had I been thinking freely. Perhaps not.