New user - Which Engraving CAM software is easiest for beginner?

I recently converted a mill to CNC and am just getting around to using it.
Have a need for some engraved 2-color plastic signs for an aircraft and
thought I would add a small router head to the mill for engraving. But
setting up the toolpaths is whole different animal. No idea where to start,
with information overload as to which CAM package to use, or how to go about
generating the toolpaths. I have a full layout done of each sign in
Autocad. What is the easiest way to get these signs done and get up to
speed? Thanks as always...

R. William Kichman, P.E.
Kichman Engineering Associates
103 Old Furnace Road
Cornwall, PA 17016-0643
tel/fax 717/270-0714