As Remethion has mentioned the Horde Community Discord is a good place to start and find RP. We try to get up any Horde events and advertise them so they’ve got a wider reach along with hosting weekly gatherings every Sunday ^^
We’ve also have a channel for guild ads, where anyone searching for a guild can see if there’s anything of interest for you
We’ve got a discord link in our forum post if you’d like to join ^^