Gold Standard Instructions For Replacing Current Combo Modem/ Router With New NETGEAR - Nighthawk CAX30 AX2700 Wi-Fi 6 Cable Modem Router

I want to make this as painless and foolproof as possible when the time comes. Unit is already Cox approved.

I can go on the Cox website and I found two links. I get the feeling however they may be talking about modems that you get from Cox and this is not the case. I'll be purchasing the Nighthawk.

https://www.cox.com/residential/support/activating-a-new-modem-or-gateway.html

https://www.cox.com/residential/support/activating-your-new-internet-or-phone-modem.html

Are there better DIY instructions on how to pull the plug on my current working modem and plug in the new one via Ethernet to get it working and registered with Cox?

I guess I can always call up support and ask them for help but I wanted to see what you all had to say first. TIA.