An entire city was discovered in Sector 7. Now you can learn how the society of the zombie apocalypse works. All newcomers first get to the Distribution Center. In exchange for a little service, they can get accommodation, access to the workshop, personal storage and good company. Unreliable community members are sent to the slums, but there’s always a chance to come back. 
The best option is to unite. There’s no other place as friendly as your clan’s base. Your base - your rules.
To leave the crater, go to the global map and press the button with faces depicted on it at the lower right-hand corner: