I’d love to help but i’d need to see more about what’s on your screen to lend a hand.
GRBL stuff occasionally needs a driver and i had to load one on my Win 7 Pro machine to get it to connect. I also have to select a com port like COM 11 or COM 12 in LightBurn to talk to my GRBL controlled diode engraver.
This is a helpful go-to to get you started. Happy to help where I can.