I kind of felt that way at that age, in the sense that I was worried about choosing a career path and being stuck in it forever.

For me, moving away from my entire previous life in a new city far away was something I wasn't really expecting I would do, but I did and I generally feel really good about it.

At your age, and when you start living in your own place, you've got to realize that stuff isn't just going to happen for you any more, and if you want something done you are going to need to put serious effort into it. Yes, it is tough to work a full time job that leaves little time for thinking about and doing much else, for ever-decreasing pay. However, you have to make the most of it, make changes you want to see in your life. Plan things out, speak with people to see whether your ideas are sound, make decisions, act on them, taking on calculated risks and responsibilities. Then you'll find you'll be able to do what you want to a bit more.