It will come. The first step is to master the tools. That way most of the mental energy is focused on the design versus trying to figure out how to do something.
And most times you will be copying stuff since that is the idea of most cnc carvings. But they will have your style built into them based on your artistic vision, design decisions, and specific techniques you use in building your patterns.
I am still working on it myself after many years trying to learn this stuff.
