This sounds like the trolly problem. If you go down track A, then there are likely to be some horrible family murders. Or track B you will upset the NRA crowd.
… Wow this Rahini guy does sound like a poster child for this law, but
ultimately the Fifth Circuit Court of Appeals ruled that the law is unconstitutional because there was nothing like it in the 1790s
Docker is a moderately sized step beyond VM.
I might recommend setting up VMs with something easy like VirtuaBox. When you have that figured out move on to Docker.
If your a casual user VMs are likely sufficient.