While there’s not regular public mage gatherings that I know of, you’ll probably have good chances of finding arcane focused characters at a new zone soon. The Kirin Tor Intelligence guild, which has ran annual mage faires and a big mage focused campaign last year, has initiated a new roleplay hub come the War Within:
The organizers are also hosting another mage campaign soon, though I’m afraid the sign-ups might remain closed unless there’ll be cancelations closer to the date. Of course if your character is only just getting started with magic and primarily seeking tutolage, the campaign might not be the best place for them to be anyway.
There’s also Dalaran Community War Within Sandbox Campaign coming up, organized by a different group of people. This will take place in Dalaran.