If it helps, the link to that Discord for weekly gatherings can be found here:
https://discord.com/invite/vvaWtS2xwz
Outside of that, there’s larger gatherings usually announced on the forums and the Argent Archives, like the Kosh’harg, as well as the first Sunday of each month usually being a gathering in Orgrimmar.
As a hub, Orgrimmar (Valley of Honour specifically) can sometimes be home to people without any need for events, but that can be reliant on guilds passing through, as most roleplayers just stick to their guilds. RP tends to snowball; if people are already roleplaying, it’s common for people to join in. If no one is roleplaying, it can be difficult for anyone get the ball rolling.
The best suggestion I can make is that you find or make a guild that suits your tastes. That’s the best way of getting regular RP. The second option is joining a bunch of different Discords and staying up to date with all of the different public events and campaigns that are occurring.
The final option is forgoing faction-specific RP and joining a cross-faction guild or community, which gives you access to a lot more options, at the expense of faction identity.