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?
If you're really not sure and don't want to break anything, I'd suggest installing some different OSes in virtual machines and try on that first. That might be a learning curve by itself, but you won't take your computer as hostage for your beginner's errors.
There are more user friendly OSes than others. I'd go with a Ubuntu or *buntu flavor just for the fact that there's a lot of beginner friendly websites, tutorials and forums.
That's two votes for ubuntu. I like the idea of a virtual machine protecting me from myself. I've got desktop and a laptop, but need them both active. I've also got an old desktop in a closet somewhere, wonder if the hardware would still be functional enough to learn on. CPU is probably a 7th gen I5, to give you an idea of the datedness.
Just checked it out, It's an I5 6500, a little older than I thought, but ubuntu recommended specs are pretty low:
CPU: 1 gigahertz or better
RAM: 1 gigabyte or more
Disk: a minimum of 2.5 gigabytes
My daily PC is an i5-3570k and it's very quick in Kubuntu (that's Ubuntu with KDE as a graphical environment). I think I have "only" 8 GB RAM and it's quite enough for my use.