I am almost finished with all of the 3d buzz tutorials on UDK now. I just have the final top down series of 24 videos to go. I have made use of BSP brushes, geometry mode, static meshes, kActor Meshes for moveable objects, Matinee for cinematic, Kismet for visual scripting. I've made my own Materials with Photoshop and UDK's material editor. I've imported my own meshes made from Blender 2.5.
I feel like it's all starting to come together. I know I still have a ton of things to learn, but I am a lot more confident that I will be able to. Sooner or later I am going to have to set up Visual Studios for writing Unreal Scripts so I can start learning the scripting language beyond what Kismet will do (Which is a lot already).
I still need to find some good tutorials on making my own characters, armatures, animations, textures, etc and how to import all of that into udk to change the users default character and add new spawn-able AI characters. If anyone has good resources for this line of study, please leave a comment.