X11 is a more stable backend than Wayland, but is generally outdated compared to Wayland. We recommend you first try speedrunning on Wayland, and switch to X11 if you face major problems.
On Fedora KDE Plasma, Wayland is the default backend. To switch to X11, run the below terminal command to install Plasma for X11, along with a few other helpful things:
After setting up resetti, see Boat Eye on X11 to setup pixel perfect eye measuring (boat eye) both for new players and those who already had boat eye setup on Windows.