I’m also writing here in case anyone else has a similar question. Getting the grbl on the Arduino was easy following those steps, so thank you. So what happens after that? How do we get the motors to move? I downloaded the Universal GCode sender and ran the test.gcode that is included in the grbl file you supplied but nothing really happened. Should the motors be moving when we press the X+ or X- buttons for example?
Sorry to keep bothering you with simple questions, but once we pass that hurdle, we should be able to put everything together! So close!