As a sophomore in high school who hasn’t taken Calculus or Physics yet I would try those first before deciding you are bad a math. If you have a goal in mind and work hard I bet you can do well. You have a long way to go with math if you want to be a physicist or an engineer but don’t count yourself out before you even start. Calculus sounds scary but it’s not really much harder than algebra, it’s just a new set of rules.

I didn’t think I was that smart in high school and now 10 years later I research and develop magnet retention methods for electric motors in aerospace as a R&D mechanical engineer.

P.S. NASA has low pay from the postings I have seen. Not a reason to not go for it but always something to keep in mind.