Start with tutorials and draw along with them. Single sided first.http://support.vectric.com/training-material/cut3d
And then maybe A07 herehttp://support.vectric.com/tut-vcp-getting-started
to import it into VCarvePro.
I have Shopbots version of Cut3D, but you may have some "3D models" that are included in the folder like I did?
And then once you've played around a little and know which of the three "styles" you want to try, maybe start here for models like we did.http://www.vectorart3d.com/store/
Ask questions like you're doing, but doing a forum search, or Google "Vectric Forum----and then your question/interest" is best, as I'd say a lot of the questions have already been answered.
Frustrating at first, but VERY satisfying and worth it.