Those directions are correct.
The LOG window shows any commands sent to/from the control board. Carbide Motion is continuously polling the GRBL control board (message count), so the message count should always increase.
You’ll only want to send the default values once, since you are re-writing the settings that are stored in EEPROM (electronically erasable programmable read only memory) on the control board. To just view the current settings on the control, type “$$” into the command line under the “MDI” tab. This command line is used to write values to the different parameters on the control board, simply by typing “$” followed by the parameter number and the value you wish to change it to. There are numerous examples of writing to parameters using MDI on this message board.
I’m still experimenting with the proper X/Y settings to avoid banging the gantry too much at the extents, but the basic (max.) limits were just mentioned here: Help setup please!
I defer to @WillAdams for when a good time to try homing is, but once you’re ready there is a good tutorial here: http://docs.carbide3d.com/article/67-shapeoko-3-limit-switch-installation
and here:
How can I permanently activate my home switches in Carbide Motion?