Help calibrating a generic cnc with grbl

Anyone in upstate SC, western NC looking to come into my shop and make a few bucks helping me configure this animal? I am having a hard time with the commands in gcode sender, how do you save a command after it is entered?

I have just built my own CNC and have gone through what your doing. I used YouTube to help me, watch these videos and I am sure they will help

I know the second video is using Mach 3 but it shows how easy it is to get going

regards Neal