The Carmack article is comprehensive, but boils down to...
(1) Backup what you've now got, individual important files & even make a Windows system image.
(2) Maybe download & keep critical device drivers like the display & network adapters at hand.
(3) If you've got MS Office or 3rd-party apps that require a license, ensure you know how to reinstate it.
After the final button is clicked on the clean install, it will be done in 24 minutes. Cortana asks for the Wi-Fi (written on the router) & MSFT account passwords only. For me, all the Dell/Intel/Realtek drivers came in automatically on their own. (Fine, a few of them constantly asked for a "reboot to complete" the install. But they had nevertheless installed, & all were functioning well. Those three all ceased their squawking after they were updated.)
Good luck, & keep us informed.