• download: https://getfedora.org/en/workstation/

• make sure virtualbox set the VM enough RAM, and has graphic 2D,3D acceleration enabled to avoid GNOME lag interface.

Switch GNOME desktop to other desktop

• you can switch the desktop at login page, click the “gear” icon to choose
• if the desktop you want is not in the list, check the list option

  dnf grouplist -v

• install by command

  sudo dnf install @kde-desktop-environment

• restart the machine, and login will have the new choice in the list