Newbie- 3D models and circuit boards, dwg to gcode

[New Reverie]

I recently purchased a 4 axis CNC mill for my shop.

This will be my first experience with a CNC machine as all my previous work was done with a hand controlled lathe and mill.

I have a part designed as a 3D model in autocad that I want to use this new CNC to make.

The part is a true 4 axis part made from 2" aluminum round stock.

I haven't had a chance to look at the software in depth that my machine comes with.

It is called DeskCNC, here is the info http://www.deskcnc.com/Features.html
The software says that it can take STL as an import file, so I am under the impression that I should be able to convert my dwg 3D models to STL and then import them into this software for conversion to G-Code.
Am I on the right track here?

The second thing i need to do is machine circuit boards for the first time. Any tips for outputting tool paths from a circuit diagram made in AutoCAD? It seems to be simple enough to save them as dxf and import them into my CAM software. But any tips from experienced users would be helpful.

Thanks in advance.

[ger21]

In AutoCAD, File>Export and choose .stl format. The model must be a single solid, and lie in the positive XYZ octant.

Have no advice on the circuit board question.