Hey!
waves friendly
There are actually roleplayers left on this realm Smiles
English RP guilds i know are the World Tree (Nightelve themed guild) and “The blue blade”.
But i see that your character is located on Lakeshire, what means that you are probably german.
In that case the “Lilien from Stratholme” would be also an option. 
But there are roleplayers who are in one of the “PVE” guilds too. These three guilds are the ones with RP background/story (i hope you know what i mean 
)
Also i would highly suggest to join the Hydraxian Waterlords discords (i will add a link to the thread. The first one for RP and the first general (not the "a bit outdated one) should be sufficient to join).
Edit:
I assumed you want to play a drawf, that´s why i added the Alliance RP guilds i know.
There would be options for horde, too.
[A][RP] The Blue Blade: Grave Winds - Hydraxian Waterlords - World of Warcraft Forums (blizzard.com)
Discords für Hydraxian Waterlords - Hydraxian Waterlords - World of Warcraft Forums (blizzard.com)