Virtual pc with gnome boxes

I tried to use boxes for another operating system, but it says that virtualization is not enabled in bios even though I did. Tried kvm before, but it is very confusing for me

  1. Check /dev/kvm exists. It probably does. If not, something else may be wrong.
  2. Check your userid is in the kvm group. If not, sudo usermod -aG kvm $youruserid, then logout/login to make the change take effect.

The file does exist, but I’m just not familiar with typing commands because I used windows in the past. Can you give me an example of creating a virtual machine on kvm from scratch? Thanks