There’s a couple guilds but in my experience they aren’t very out there in the world.
I mostly see DH as a companion class in other guilds rather than in DH only guilds and I think thats a good place to be as we’re so niche that being in our own groups doesn’t give much opportunity for interaction with the rest of the RP community.
The Legion war is over and aside from doing Doom RP (which is quite cool) there’s not much for a demon hunter to do, so maybe you might be looking for purpose, maybe you want to go back home and serve your people in a guild that accepts your class…