I put this in as a reply earlier, so just copy/pasting as a comment.

If you’re interested in selecting colleges, look into subs like r/applyingtocollege or r/chanceme (reverse chanceme yourself to get a few good schools); proceed with caution into these subs, though, because they can be quite toxic at times.

You can also do a bit of research into programs geared toward high schoolers, especially those that allow you to specifically focus on astro/aero studies.

I recommend MITES/MOSTEC through MIT; the program was a game-changer for me. There are plenty of other free programs out there, so just apply!

Lastly, relax. Half of the college student can’t answer these questions for themselves. Take your time!

P.S. I am a first-year Astrophysics student. Feel free to DM me if you have questions.