So for context, I’m an asexual guy who had one girl in his classes at high school & went to a 75% male university on a course that was 94% male…

Right after graduating I had the same issues you’re describing, just from “new experiences” more than anything, but when you go out into the world and start interacting with people you’ll be fine - it’s somewhat normal especially if you didn’t have a drive to seek out women previously or even just didn’t have the self confidence to

Also though, that sounds like a bit of a weird interaction as an introvert anyway, I don’t think I’d have been super comfortable either way as I’d be expecting to be robbed or scammed or something, but if someone is expressing interest in something you’re passionate about then they very clearly want to hear about it, so just say things about it even if it’s cringe or not perfect