Fedora Kinoite or Bazzite (which is based on Fedora Kinoite).
Both are "immutable" which all you need to know means they are essentially impossible to meaningfully break.
Both use the KDE interface which is very similar to Windows and very tweak-able.
They're very similar, but Bazzite is the one to go with if you do a lot of gaming. It's basically the Steam Deck OS plus a little more. I've tested Bazzite with an Nvidia card and had no issues whatsoever and performance was nearly identical to what I was getting with Windows.










Zorin is great for a grandma, but for someone who knows computers I think it's too simple.