Your question asks the blind men to describe the elephant they're touching: there are at least half-a-dozen "Puerto Rico" community types available.
Your biggest constraint right now is internet signal, then sewer, then electricity, then water, then healthcare services, then food, THEN shelter.
If you constrain those items above to be immediate "Must-Haves" then you're going to end up in 2 or 3 spots that may as well be Miami Beach. If you can get creative, you can explore the communities that, while within sight of the coast, may still be a half-hour (or more) away. [!!!]
Go there and rent the smallest car you can find, fill the tank, and take a drive. Circumnavigate the island in a day. If you find some place you like? Hit your banking app. and search for the nearest ATM.