Follow up on a few of these. Let me start with a basic work flow for learning
Focus on getting a map rigged and setup. Dont worry about textures and art. Just get it into the game and able to run around in it.
The level builder pdf can be pretty confusing but it has the answers for most of it.
Trial and error through it. Its the best way to learn but not the easiest. Follow along with other tutorials already here on gr.net
Maps break down into a few things. Room groups, sherman levels, and portals. Once you understand these you have the foundation you need to conti