There’s also us, the Onslaught which is both Alliance and Horde side.
Should you wish to learn more about DK RP, I’d recommend taking a look at our thread:
https://eu.forums.blizzard.com/en/wow/t/ebon-rp-a-h-the-ebon-onslaught-on-the-hunt/68338
Then again, a NE DK would be -difficult- to pull off for a new Roleplayer.
I’d suggest you observe, first and see what you’d like to RP.
Start with an human, always simple - versatile!