Can't start High Mountain

I rushed to unlock void elf first. But now my order hall doesn’t give me any place to go. I’m stuck, I can’t start high mountain.

If you haven’t already, do the Legion intro by selecting “The Broken Shore” from a Hero’s Call board and followup through getting your first artifact. (Some things work is you skip it, and some things don’t so it’s safest to complete it,.)

If you started another zone, you’ll need to continue with it for a bit before the map will let you choose a new zone. (Typically, once you get to the first hub with a flightpath you’ve gone far enough.)