I've dabbled with a variety of CAD programs, never long enough to become adept at any of them, and SketchUp is the most user friendly of the ones I tried. You could also look at SmartDraw. It has some quirky aspects to it but it's easy to get started. Good luck!
Maybe it should be obvious, but what do you use that concoction for? As an aside, I'm constantly blown away by the wide range of expertise from people on this forum!