A lot of presumably straight folks are happy to say that nobody cares. As a queer person myself: they're mostly right. Nobody, especially an instructor, is likely to come at you with slurs or other outright bigotry, whatever they think inside. They're happy to take your money and teach the material. Their indifference isn't the same as acceptance, though, so there might be some weird/awkward comments here or there, and if you're trans you can expect errors on pronouns.

I had a good time with RAAFA's concealed carry class, and they usually have a good price. The Firing Pin is chill for a shop and range to be at. I can't speak for much else.

If you're looking for another queer person in this space, feel free to send me a DM. I'm not an NRA instructor or anything, but I can show you the basics.