The first two years of any medical school is straight lecture on the island. Then the last two years are clinical rotations where you do your rotations at your choice of affiliated hospitals in the states.
If you are still in high school, I’d recommend looking into some Caribbean pre med programs. For example AICASA is my school’s “ junior” school. It is a 2 year program for students straight out of high school that will prepare you for everything about med school. I have a masters degree in molecular biology and biotechnology and the kids that come out of AICASA are better prepared than I am.
Please reach out if you have any questions!