Every other forum has rules about these posts because there's such a glut of them, and yes, I could go read a stickied thread elsewhere, but here I am not doing that.
How would someone with no computer skills get acquainted with the OS? What version would you recommend to the hopeless novice? Can I keep windows on my PC and run the new OS or a practice version of it in a partitioned space while I learn? Can someone with minimal skills/time/patience be happy with a unix-like OS?
Consider this another vote for Ubuntu or any of its variants. They're beginner friendly, and established enough that you'll find plenty of resources written specifically for them. Linux Mint is another one I'd recommend for beginners, it's designed to "just work" out of the box and be an easy transition for Windows users.
Then it's just down to using it some. First and foremost, leave Windows installed until you're comfortable with whatever else you end up trying. Whether you partition, or make a bootable USB drive, or even just a VM, use some kind of temporary space for practice. The terminal is a lot less intimidating when you aren't learning in your main environment, you can go break things and see what happens.