hey there parter! and welcome :)
im sideways, my pronouns are they/them or fae/faer. either one.
the categories are really confusing (at least for my dumb ass) but basically they help you specify what you're talking about so that if someone is specifically interested in that they'll see it easier. (so like you could put this in the intro section) to find these there's the dropdown so just click on a category and it'll bring you there and you can write something relevant to that in there.
hope that helped or it was just a ramble ig we'll never know.....