Just did a fresh install of 2.1.0 but all the quests appear be missing entirely. Also, had no starting inventory and started on a single dirt block on a void map, making the pack completely unplayable without admin codes.

This is not a bug. On the main menu of the modpack there should be a download maps button that fetches the maps from our new CDN Server for less file size and less modpack updates. The quests do not appear in a normal world.

I really do have to make it more clear TBH

Maybe a default quest on the default map that would instruct you to go back to the main menu and download the relevant map?

Also, I feel like an idiot for asking this, but how does this map even work? I downloaded it, I got to the pyramid, even made a transmutation table, but I'm honestly not sure how to progress or complete any of the quests.

Sorry for the late responce. Are you stuck on Iron? My one clue is zombie pigman drop gold