For new users one might suggest something with a lot of GUI. in that case some kind of debian spinoff comes to mind.
As mentioned ubuntu or mint, all same game.
Somehow distro's like CentOS , Fedora and Suse are never mentioned whilst being kind to beginners aswell.
My little brother recently started with linux.
I sat aside and guided him through Arch's install , which is plain CLI recently.
He did the typing and i let him do the thinking.
I believe he learned more linux in 4 hours than most ubuntu users do in 6 months.
But thats just me, im an asshole