You'll start facing a door, you're going to turn around and exit through the open door. Here, you'll see there's a bunch of doorways to your left, there's a couch in the distance slightly right. If you turn even more right you'll see some, like a yellow counter. Walk towards that counter, and it looks like it's the kitchen. Now here, slightly turn left. Walk straight ahead towards that couch and you're going to go to the left side of that couch, and you'll see a set of stairs leading up. You'll walk up two steps to the first landing and stop.