Not every CNC router operates in the same way, so the specifics of how you use your CNC machine will depend on which one you choose. In general, it’s best to start by designing your product, cutting it out, sanding it down, testing your design, and refining it until your products look and function how they’re supposed to. You could also download some free CNC project files first, if you just want to get used to using your new CNC machine.