If you’re going to be using a DE and mostly do stuff through the GUI instead of terminal/command-line then make sure you can go admin mode (Root/Sudo).
Besides small annoyances I had with KDE Plasma 5’s UX the main reason I didn’t like it was that often enough I would have to use admin privileges but I couldn’t do it through the GUI File Manager (Dolphin) so I frequently had to use the terminal.
It should be possible to have admin privileges in Dolphin but I was a noob and didn’t know how (and still don’t even now).
If you end up facing that issue then either be a bit smarter than me and look up how to do that or use Nemo, another file manager, which is more or less the same thing as Dolphin except when I ended up using it on Linux Mint a while back it let me use it as Root as a feature out of the box.
And for the record I don’t like Linux Mint, apt package manager sucks (package managers are basically app stores where you get all your stuff), but at least it was super easy to install and Nemo was a good file manager.
If you don’t mind tinkering and have a secondary device with an internet connection in case you break something then I would recommend Arch Linux. Or you could try it in a Virtual Machine I guess.
Pacman (Arch’s package manager) is a hundred times better than Apt, and then there’s the AUR on top.
Also while I’ve never used it I hear a lot of good things about EndeavorOS, Arch Linux but supposedly easier