First off, the English word you are looking for is "can't", "cunt" is a vulgar term for a part of the female body. :)
That said, most buildings are set so that only the owner can enter them. So unless you own the buildings around you, you will likely not be able to enter them...but you are not missing much, most buildings are identical to the Civic Centre that you started in...just a bunch of empty rooms.
I'd suggest you start your gameplay by finding a faction to join, and arranging to have somebody bring you a ship, so you're not stuck on the planet :)