I Received an Offer, but Made a Big Mistake!!

I basically received an offer for 2025 semester one, but I didn't realize it was would begin so soon in March 2025. I will still be in high school in March since I graduate in May!! I'm so stupid for not double checking the start date... But is it somehow possible to change my application even though I sent my transcript and received an offer from semester 1 to a semester 2 offer?