Hey Derk,
with the proximity sensors you avoid any bumping at all, it simply stops when the sensor senses the metal of the opposite moving part.
I would suggest that you familiarize yourself with the commands that appear in the link mentioned above about ‘tool-change’ routine. You can familiarize yourself with all the commands by entering them one at a time in the Command Entry Field of the MDI Tab and see what happens. Yes, little can happen, especially with no bit.
You can find the entire g-code command reference here.
Precisely. I see no reason why you would not succeed, if you give yourself the time to explore it and get familiar with it. Take also the time to study the documentation and specification, it answers questions too.
We all come from a point where we knew nothing .
That’s a good attitude. But, as I said earlier, mastering a CNC machine is nothing one would expect to happen within a few days. Take your time. Good luck!