Leave Vault 76
Now you can head to the Vault 76 entrance. To do this, go out of the room with the computer and then head to a nearby room. Follow the only available path – and take the C.A.M.P. system used to build bases. You can also pick up perk cards from one of the tables to get promoted to the next level, but if you leave the cards, you’ll get promoted when you leave the vault either way.
You’ll find yourself in front of the main Vault 76 gate – it will open automatically. After you leave, you’ll be given a new story mission: First Contact.