Happy turkey day everyone. I need some help configuring grbl please.

Happy turkey day everyone. I need some help configuring grbl please.

Right now I’ve got my “MicrOx” running off a RAMPS, I gutted all the temperature and soft endstop safeguards from Marlin, Vectric Aspire with shapeoko postprocessor to generate the gcode, and Repetier Host to send it. It was good enough to test the movements and do some basic jobs like a planing run and those pieces.
Anyways, time to switch over to grbl and chilipeppr. I’ll load up grbl for ramps. What settings do I need to tell it from that $0-$22 section? Do I need anything in my starting or ending gcode to play nice with grbl?

Thanks!