Since it sounds like your return is recent, have you heard about Pandaria Remix?
It’s been out for a bit now, but it’s been very popular, and I know a lot of people have been playing Remix much more than Retail. It appeared to me that Silvermoon and Orgrimmar both got quieter than they’d recently been quite suddenly after Remix launched.
We are, of course, also in the midst of an end-of-expansion phase, which is often a quieter time.
WrA isn’t dead, but it’s not hopping right now. I do recommend playing here for a bit before you pay to transfer a bunch of characters, though, because it’s always a good idea to test the waters before spending money.
If you’re interested in getting into RP (welcome!!) and potentially finding a guild, I suggest joining the Wyrmrest Community Project Discord server – it’s a good place to meet people and start getting the lay of the land.
Welcome back to WoW!