I think you didnt understood me 100% I wanted to say that you should do follow tutorials step by step but based on that decide what of the steps you think are usefull and try to find a combination which matches your style. In other words do make thise sigs by following the tutorial step by step and see what parts you like and which you dont. That way in the end you should have a wide variation of techniques you can use and you will have a lot of freedom while doing gfx. Being able to do what you want and decide yourself what the next step will be.
You just lack some technique now and the only way to get those is by reading/watching tutorials or asking someone to help/teach you. I hope that I will be able to give you some real cnc next time and good luck