How to start Heart of Azeroth Questline at max level?

Hi! I’m trying to do the heart of azeroth questline on an alt that I have at 70 in dragonflight. I had originally leveled the character to max level during shadowlands but never actually did any BfA content to do so. I’ve been trying to find the quest that starts the heart of azeroth questline but haven’t had any luck. So far, I’ve got to Silithus and checked the earthen guardian in Boralus to try and start things up but I’ve had no luck. Any info would be greatly appreciated!

Do the intro quests to bfa and talk to the dwarf outside the inn. He should tell
You Magni wants to talk to you and then go to Silithis.