Anyone have an easy to use program so I can start on my concepts?

autocad is free for students, but I hear that solid works is far superior. however, I use blender for concepts, but you can’t really use it for anything except concepts.

So which, autocad or solidworks

that depends on how much you are willing to spend. If you are really set on starting a business, then I would go for solid works. If you don’t want to spend and you’re a student, then you can go for lower quality for free with auto cad. I’ve also heard that emachineshop is awesome, and it is free, but it only works for windows.

I use AutoCAD 2013 Mac and it gets the job done.
Autodesk has some quick tutorials too.