I used timeshift (plus timeshift-autosnap, and I think it was, timeshift-btrfs) for a couple of years on EndeavourOS, and it saved my ass on multiple occasions. Btrfs made it so the snapshots were iterative, and therefore only the first one is large.
Now I’m on Bazzite (loving it), and ostree has basically made snapshots obsolete.
Plasma is KDE, it’s a desktop environment… So it would be comparable to “Cinnamon” or “MATE” for Linux Mint (I believe. I’ve never used Mint), not Fedora or Mint (which are distros).
You should be able to run Fedora with KDE and Wayland should work (unless it’s a hardware compatibility issue).