I can’t tell if you read the article. The idea is to not use resource demanding operating systems but stay on some lightweight alternative like a particular Linux distribution.
So how to get Windows 11 running seems entirely off topic.
Yes, I read the article - just venting - I would love to get a Linux or Haiku OS installed on this machine that is able to use the nVidia Quadro K2000M hardware and drive an external monitor configuration - but so far, nothing has worked. This is an older machine sure - and should run just about anything well - i7, 32gb RAM, 1TB SSD. Seems a shame to just junk it because nothing can handle the discrete graphics card except Windows.
So how to get Windows 11 running seems entirely off topic.