Always back up your stuff, but after doing so, the process is pretty much boot to bios, set boot priority with linux usb at the top, and away you go.
If you have secure boot enabled, you might have to enter a pass code or passphrase but otherwise its identical to traditional bios. If you want secure boot, which prevents someone else from doing this process to your machine, re enable after you’ve installed nvidia drivers otherwise you’ll have to provide it your secure boot password during and sometimes it likes to break.
Idk, probably not around kids…?