The other thing
@Letteyeti besides what she said above, is that just because you love something doesn't mean you want it for a career. I love music. I really do. I'm very good at it. I'm not passionate enough about it, though, to make a career out of it. It most likely would have had to be teaching. It would have been every day of learning about it in school, getting graded on it, and then if I'd become a teacher, I would have been dealing with the ups and downs of being a teacher. And as it turns out, I'm really sorry okay with not doing music every day of my life. I think people who go into teaching music are really passionate about it and want the next generation to learn about it, and that's something that I lack. I also think they love it so much that it has to be part of their lives, and it turns out that I'm okay with it being a hobby. I never wanted to get to the point that I hated music because it was my job and not something I wanted to do.
Now to my job... it's not something I pictured myself doing in high school. But I like doing it. I like feeling productive during the day. I like contributing to my company and its wellbeing. I was out of work for a while last year, by necessity, but I hated it. I enjoy sitting at my desk with my spreadsheets and keeping my mind engaged. At the end of the day, I'm also perfectly happy to log off and be done with it for a while. There are days where it makes me completely crazy. But it pays the bills, I don't mind doing it, and I have balance in my life for doing other things I do enjoy.
Which again, you might not discover what you want to do until you're in college, or you might be like me and get a general business degree and then fine tune what you want to do once you get some experience. That's okay! It happens. I was entirely different at 16 than I am now. I actually was entirely different between 16 and 19. You'll get there. Promise.