When you fill in forms, you do need to enter your address, you just put something down noone cares because noone will ever send you anything, there is no postal service either!
As for getting around, it's much easier than it sounds honestly... but if you plan to come to Libya i think you need to prepare yourself for a big shock... Libya is NOTHING like the US... i think you'll need to wipe out your "normal habits" folder in your mind and open a "new folder" ready for completely new ways of doing everything such as driving around, filling in paperwork, dressing, talking, thinking, behaving.... lol I don't mean to sound negative, it's actually really nice here but it's like living in another world