I think my time as a kid, way back when, playing Doom and Jedi Knight PC games and Mechwarrior geared me up for Sketchup. hehehehehe
Plus working with visio a bit in 2D quite a bit helped.
Once you get the hang of moving around in a 3D environment and how to draw a bit, you'll get the hang of it. Blender was a completely different animal.. since it's open source it doesn't look like a windows program so much as Sketchup.. So I never really learned it. Sketchup is a nice beginners program.. I hope to learn Blender or pull from either into some nice ray tracing program to do some really nice renderings.. That's when it gets cool! Like some of Reaper's work.. I just never have time to learn it.. Since my basement dream has been put on the backburner AGAIN, it's been low-priority.
sadly. My paradigms have been in boxes with my servo-15 for going on two years! I'm living vicariously through you guys who are actually building your theaters... for now. boooo whoooooooo!