Like most of you I've wanted to give 3D printing a shot for quite some time now, and like most of us learning to use 3D CAD software was the big hurdle. Well I finally downloaded the "hobby" version of Fusion 360 and started using it. Surprisingly I've found that it's not that hard. It's basically drawing a 2D sketch and extruding it to a 3D form. The Fusion 360 forums have a lot of activity and have helped me several times so far. There is even a function in the software where users can share files and make a little step by step video of them showing you how to do whatever it is you have a question about. I started with a box car as it's basically all straight lines and squares. This is what I've got so far.
I did have a couple of years of drafting and design in high school which I'm sure helps, but if I can do it anyone can.
Sorry Ed, I'm not trying to hijack your thread, but it seems a common thought is the process of learning 3D CAD is a non-starter.
Scott