How to get into Halatali? Might have screwed this up...

I think I royally borked this up.

I'm lvl 80 at the moment, and realized that I would very much like a room in my FC's house and therefore needed to actually get to the right level with the Flames, which I have obviously neglected.

I have to do the Hunting Log entries for it, which mean I have to get into Halatali. Looked it up, found out I have to talk to a guy in Vesper Bay, which I did... But it sent me on a quest for a Relic Weapon instead. I came back to Nedrick in Vesper Bay, but he is now not giving ANY quests at all.

Did I just screw myself? Can it be fixed?

You can't permanently break anything here.

Most likely you have already accepted, and possibly completed, the quest to unlock the dungeon. Check whether it's in your dungeon list (it should be fourth on the list if you have it) and if not, whether you have the quest in your journal.