Definitely you should look into Linux, it's really gotten quite good. Especially if you don't need games with anti cheat.
But if you just want to use Windows 11, it's super duper easy. Just Google "download Windows 11 iso" and grab the iso file from Microsoft website.
Then download Rufus.
Then pop in a thumb drive that's at least 8gb. Open Rufus, select your thumb drive and the iso, then choose the option to remove windows requirements, then click start.
Backup your files on Windows 10, save them somewhere. Then pop in the thumb drive and install windows 11 fresh.
The requirements aren't actually required. Win 11 runs fine on all sorts of hardware. Support stops at 8th Gen Intel, but I've installed it on 5th Gen. My work laptop is 2nd or 3rd Gen. It's fine ๐คทโโ๏ธ
Technically less secure? Yeah, in some ways. But it's miles ahead of running unpatched windows 10 after September.
This is a minor issue compared to the security risks. See the other comment in this thread for a good explanation.