Just a quick response (Score 2)

I have been doing 3D modeling for over 25 years. If you really want to get good or create some neat stuff, it doesn't matter what program you use. They are all "hammers" and we all prefer a particular "handle" to pound nails. If you really want to do some scripted 3d renderings, use POVray, If you want a program with a UI Blender,3DSMax, or something along those lines works great. If you need precision, any form of AutoCAD works great. Pro/E and others like it are a bit more difficult. Pick a program and buy a book and learn to use it, or search YouTube for video tutorials. I use autodesk programs and I am in the ADN, because I enjoy writing my own plugins and all autodesk programs are fairly easy to write add ons for. If you want to create great models you will, but you will have to learn the terms and quite a few complex operations regardless of the program used. That's just the reality of it.