Everything that Berainlb said, PLUS, you want to use “Absolute Co-Ordinates”
Once you have LightBurn open, that’s when I power on and plug in my AtomStack. But before I do that I manually move the head to lower left (screen) or closest to me left (physical machine).
It will always start there and if you hit 'return to origin" that’s where it will “home” to.
You can find lots about your machine with some searching.