To answer your question regardless, Wyvern’s Tail and the Valley of Honor have a lot of rp traffic. A good time of the day I would say is mainly around… 4 or 5 PM Server Time is when a lot people tend to pop up. Because Orgrimmar’s design isn’t exactly RP friendly, people have picked one spot where most of the rp is. Though people still walk around and you’ll occasionally see people in the Cleft of Shadows, The Drag and the Valley of Wisdom. I would typically avoid The Valley of Strength, but it doesn’t mean you can’t end up there. But starting there is not advised, it’s mostly an OOC zone where people are running in an out of the Auction House much like the Trade District in Stormwind.
My suggestions, if you are new to RP, to invest in the Add-On Listener. I typically only use the Snooper function that comes with it and ignore the main Listener Window. You can toggle the Snooper window on the little icon that appears after you download it, and when you do that it’ll help you keep track of people’s posts so you don’t need to worry about asking them to repost and it’s a life safer in areas that have a lot more people. A lot people tend to have anxiety with keeping up with posts because you have everyone posting, so the Snooper function elimates the stress of feeling lost. When you click on soemone, you’ll see all their posts including how long ago they sent it so you know how long you might not have been paying attention lol.
I hope you’re doing well, and that you’re having fun out there. Stay safe, and be kind.