Welcome!
At the top of these forums is this thread: Compendium of Roleplay Guides - #2 by Greyah-wyrmrest-accord which is a great resource for new Rpers, and answers a question or two of yours. I recommend checking that out.
To answer your other questions, RP realms can seem more social, because you’ll see RPers RPing in the world, where on other realms folks are usually running content or talking in groups or guild chat from the comfort of a rest area.
WRA is predominately Horde-leaning population wise, but we all share the same spirit and passion for the community as a whole.
I hope you’ll be happy here and please don’t hesitate to ask more questions or get involved.
Have fun!