Before this thread devolved, there were some great stories about how people chose their careers.
Turns out, some people know what they want to do from a very young age. Some of them did that, and some still ended up in positions very different from what they envisioned and loved it.
Some went with what was practical and made money. Some fell in to careers and some just work jobs, wishing they were doing something else.
But the point is, you do not have to decide what you’re going to “be” at 18. Life takes us different places. Be open.