It's been an hour so you probably figured it out, but here goes:
You are likely missing the mechanism that activates the elevator in the second room.
Use Left-Alt (by default) to highlight some of the more prominent actionable objects.
When you've become stuck at a certain place, try opening the journal and checking the objectives. If you're aware of the objectives and stuck in the area, try changing your perspective or angle of camera. Definitely check the mini-map if you become frustrated at which direction to head next- and remember that Mouse Wheel Up/Down will zoom the mini-map as well.
Good luck.