Windows 11 just lost 5% market share in two months despite Windows 10 losing support.
(www.windowscentral.com)
Getting a modern motherboard to boot to a USB key is still a royal pain in the ass.
(Edit: I forget that windows ships full disk encrypted now. Be sure to get your backups off of the Windows drive first!)
Pro tip: if you have the luxury of a spare hard drive, use it. Pull the old windows drive out entirely and set it aside to reuse later. Various "security features" that work to "protect" your Windows install behave better once the Windows drive is completely removed.
Once the Linux live USB is up, just click install and then "next" a bunch of times.

