I know Alliance Side there’s the Gnightly Gnews at Gnine every night in Stormwind, if there’s something like that in Orgrimmar I’d suggest going because events are often advertized there.
Checking the forums is helpful, and as said above not every event gets a thread but there is the calendar that was re-made after the old one got put into Read Only Mode with the old forums. It also lists Neutral events alongside faction specific ones.
You could try to get into some communities, many of those host their own public events that way, especially cross-server if they’re anything like the Boralus RP community.