I believe that most drafting programs today have become sophisticated enough that figuring it out on your own is getting harder and harder. I'd liken it to cell phones-you need a 2 semester course to figure it all out. As the hardware advances the applications advance. I'm only familiar with basic AutoCAD (no add-ons) and I have taken two full semester classes at the community college withoutout which I'd be fumbling around making octopussies. The classes have been very worthwhile. And we didn't even touch on 3D. That's next semester if I choose. My guess is that any program you get is going to require a bit more than winging it on your own. Good luck.
