what is a no nonsense way to create a ubuntu virtual machine using virt-manager on command line

1. I tried various methods explained on internet, but none seems to be working. using local iso image give one issue and location gives another issue.
2. Can we setup IP using this command?

currently using this command sudo virt-install \ --name worker-2 \ --ram=4096 \ --disk size=100 \ --disk path=/opt/sciserver/vm/worker-2.qcow2,size=30,format=qcow2 \ --vcpus 2 \ --os-type linux \ --os-variant ubuntu20.04 \ --graphics none \ --location 'http://archive.ubuntu.com/ubuntu/dists/focal/main/installer-amd64/' \ --extra-args "console=tty0 console=ttyS0,115200n8"

and error says.. "ERROR Error validating install location: Could not find an installable distribution at 'http://archive.ubuntu.com/ubuntu/dists/focal/main/installer-amd64/'

The location must be the root directory of an install tree. See virt-install man page for various distro examples."

Your help will be much appreciated

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Link to original article：https://stackoverflow.com/questions/72785044/what-is-a-no-nonsense-way-to-create-a-ubuntu-virtual-machine-using-virt-manager