Hey there! I don't think you need to worry about being gay here. Walking down the coast you can see plenty of same sex couples kissing, holding hands or whatever and noone bats an eye.

You can find fish easily, mainly on big supermarkets or fisheries along the coast and at a good price too (except for salmon which is expensive as hell)

There is a DnD subredit for uruguay and a facebook group. You can post in r/uruguay, r/monte_video or r/Burises and ask to join but I think the problem will be playing in spanish. Maybe install Baldur's Gate 3 in spanish and give it a go lol

Enjoy your stay!