Glad to have you on-board! As Brian mentioned, that guide should give you a good starting point, I would make sure that you create a backup and then restore it on the SonicTransporter when it arrives.
You can still keep Roon on the laptop, but instead of using it as a Core, you can use it to control the SonicTransporter! See Running Roon as a Remote Guide for more information in this regard. Any other questions you may have once you have then new setup in place, just let us know!