I love San Diego, but it’s not the Caribbean.
The DR is inexpensive and lots of all-inclusive which is great if you want to lay around (which I have no problem with), but I wouldn’t go to the DR to travel around and see stuff from a safety perspective. Just my opinion. Been there a couple of times and had fun but didn’t leave resorts.
I loved Barbados. Longer to get to, but if you’re thinking of Curaçao they are both the southern part of the Lesser Antilles. The west coast of Barbados is calm water and beautiful. Stayed at The Waves. Small beach but good food. I didn’t travel around but I want to go back and do that. Safe island and water is definitely good, like Ames

.
I’ve been thinking of going to Curaçao too, but haven’t. Also want to go to Dominica