Touch plate calibration/ setting up for my first milll

Hey y’all, I’m back with a simple question for many but challenging understanding for me.
What I’m basically trying to figure out Is how or if all of these commands will have to be done in order to start and complete my stocks that are ready for milling.
Need some insight to assist with the biggest task at hand which is process of elimination in order, to complete my cuts.

Thank yall please let me know what you think!