Session Zero
It would seem that I too have been chosen. Hello friends.
I just took a moment to get a synopsis of the modules, and there are two ideas that I really like.
The first is for Storm King's Thunder, which comes with high praise as a good balance of diplomacy, combat, and exploration, and seems like it has an open-ended structure that allows for a lot of player agency. Starting as fourth level characters would probably put the ball in our court for a little while, allowing us to take the time to really get into roleplay and flesh out the relationships between our characters. This module combined with the Yawning Portal and/or Ghosts of Salt Marsh as supplement sound like a dream combo that I'm seriously considering getting sometime down the line.
My second choice would be Dungeon of the Mad Mage, which sounds like a fun little rat maze to run through and have fun with. I can only imagine what kinds of exciting encounters await within a sprawling mega-dungeon.