No direct spoilers
I beat bg3 tonight. A zombie I didn’t know throws a party for me and the two other people in my party… Like 30 empty chairs. I think I missed a lot of the game.
I bet that zombie spent hours getting all that food, furniture, and a musician I didn’t know together.
Go to the underdark first. Complete everything down there up to the elevator (you’ll know the one since it gives you a warning). After that go back to the mountain pass and finish it then head to act 2. This will net you the most story and loot.