Its either quite empty because all the guilds are somewhere in world for some event, or quite full because they are all back. But if you want to rp on hordeside i would recomend finding a guild. If its with your Orc there i can reccomend these two, since we had some events with them in the past and they are a bunsh of cool people.
At least to my knowing they also take green Orcs and not just Maghar.