Welcome. CNC is pretty fascnating stuff around here. More specific questions get more specific answers. One of our members, Gaffboat, just wrote a second book on the topic. Here's his first, both are available under Professor Henry as author, on Amazon. The first is basics, the second is on sign making, production and finishing methods. Gotten nice reviews and if you search his posts, you'll see why I'm suggesting his books.
The more I do, the less I accomplish.