Blind visitor to PR

Hello, my name is really Captn Blynd. I am a visually impaired (Legally blind, can't see stuff) individual considering a visit of a month or so to PR. What this means in practical use is that I DO NOT DRIVE. That and safety are real concerns for me. It would seem that public transit is nearly non-existent. So I am thinking San Juan simply because I can find somewhere in walking distance of the stores and such. I have read that the water is more clear on the south and west coasts so prefer those areas, but I am open to any advice. I would like to spend some time in, and on, the water.

Are there other communities I should consider where I do not need to drive?

Any comments on taxis or uber?

Any areas I should avoid stumbling around?

Any general thoughts on where an old blind guy can park himself on a beach and maybe drink a pint without worry?

I'm probably 6 months out from my trip but I over-prepare. I kind of have to.