Haven't set up Windows 11 on a personal machine yet, but for Windows 10 step one is download O&O Shutup 10 and let it set all of their recommended settings. After that all that's left is setting my wallpaper black and fiddling with some taskbar settings. I'd highly recommend checking it out if you're looking for a quick way to get sane defaults set on new Windows installs, including Windows 11.
I had not heard of Shutup 10 before, so thank you for this. Definitely keeping that in my toolbelt. Happy to report it works well on 11 and helped get a few settings that I hadn't found myself.
https://www.oo-software.com/en/shutup10