Okay, so my guess was right. Don’t bother setting things up manually, qemu and libvirt are hellishly complex. If you don’t need something super special, use virt-manager.
Just use the provided qemu image on the Kali site, import it, and you’re good to go. Don’t worry about the other stuff.
Depending in your screen you might have to set a custom screen resolution, but if you’re using something standard, xfce should automatically recognize everything.
A little tip: set up an ssh server on the VM and upload an ssh key, that way you can get a Kali she’ll quickly from the comfort of your hosts terminal.
Just in case you are on a desktop and using qemu for local virtualisation, I would recommend you use virt-manager.
Besides that, set up spice or vnc daemons in the guests, as others have said.
Just in case You’re virtualising Kali Linux, use their provided qemu image, you won’t have to worry about it. If you don’t know what Kali is, don’t use it.
To add to some that the others said: A world federation.
After the European Union eventually grew together to the European federation, many nations pushed to cooperate against worldwide problems. This eventually resulted in the continuous strengthening of the United Nations. Over time, nationality became more and more meaningless until eventually the point was reached that any of us only consider themselves part of the United Nations of earth. At last, humanity united.