

KDE is the easiest for coming from Windows, you almost never never need the command line or anything “extra” to customize it (beyond what even Windows will allow).
GNOME (especially in Ubuntu) by default is more Macintosh-like which might appeal to some people, it’s “simpler” but any customizations will require navigating the add-ons (and in my experience inevitably the command line too).
I think KDE is the one for most people who just want a functioning PC. GNOME could be good for the PC you might make for your parent. Bonus points for an immutable distro which are even harder to break.
Zorin is another distro that (very successfully imo) does a windows-style taskbar with GNOME and is parent friendly, though like I said before I think today I would go with something immutable for a non-techie because they’re very hard to break.