For the spindle see:
for running the machine see:
https://my.carbide3d.com/gswso/06/
and the other videos at:
Have you done:
One big confidence-builder is to just use the Quick Draw marker holder to plot out some things on paper — it’s low-risk, but you can get as intricate as your patience allows — even do tool changes for different colours/marker widths.
EDIT: That all assumes of course that the machine initializes normally:
https://my.carbide3d.com/gswso/05/
see: