There is a portal you must take in Dalaran to get there. The Order Hall is located in Mardum, The Shattered Abyss. This guide will go over everything about the Demon Hunter Class Order Hall Campaign in Legion including:
The follower missions will take a big portion of your time, so I'll list each one of those as well and when you get them. I'm going to list the quests you get and what you must do, as well as when you get them.
