I was at that same point you were just about 4 years ago! I've completely made my mind up about what I want to do, but some things are just still unattainable for me, such as travel.
Honestly you just have to "pick" what you want to do with school and just go for it. It won't take long for you to find out if that's what you want or not. One thing you should not do is take too much time to start school up again, I'm very glad I went back to college at around 20. I know some people who always planned to do it and took time off from school for travel/ other reasons, they never ended up going back.
Seriously, just find a good college that's not too expensive, that has what you want to do and just do it. Travel and other things will come soon after. It'll take a bit of work to get to the point where money isn't an issue anymore. Good luck :)
English