I've finally gotten around to trying out the Skyrim Creation Kit... something I've wanted to do for a long time.
There's lots to learn from it, how their workflow works, the way their environment kit pieces are made and named, how the editor works, lights, ambient sounds, how actors are placed, and how they are set up to play animations or use furniture.
Here's a video of my finished level:
Here's a few screenshots of my first level that has a basic pass of everything in it. Still rough!