Return from Shadowland-question on fly in Shadowland

Recently return to WoW. Previously play little bit on Shadow land.
Can someone help me on the quest that can help me fly in Shadowland? I have search the region and main city, no quest available anymore. It is said that I need to complete the campaign quest flow, but I cant find where I can start…

You have to complete the entire campaign to open up flying. That includes the maw quests with venari