Here is the official HA Installation guide for KVM. Scroll down to the HYPERVISOR SPECIFIC CONFIGURATION" and you’ll see a couple of tabs KVM (virt-manager) and KVM (virt-install)
Here is a Community Guide that is pretty good for the virt-install method. It is for a headless/CLI driven system, but if you have a display/keyboard or a remote desktop to your system, you can use virt-manager UI instead of virsh command line to install and manage the VM. I actually use the virt-manager based install method.
I should add that what you probably did the first time was to install HA Core either in a Python-venv or a Docker based. You can just remove those as they are not needed.