If you've chosen to turn right and venture down the first floor corridor, you'll eventually come upon the offices which house the Minister of Magic, Undersecretaries, Support Staff, and Administration. Two, wooden double doors are closed in front of you, and upon opening them you enter into a large lobby area.
You'll first need to proceed forward and visit the front desks, where a member of the Administration team will greet you and point you in the right direction. Sometimes, if the person you've come to see is unavailable, you'll be asked to wait in the lobby area. The lobby area serves as a waiting room and is full of several chairs lining the walls, a few coffee tables with wizarding magazines scattered across them, and a couple of plants decorating the corners of the room.