The trick with linux isn't to learn the flavour, it's to learn linux - once you get an overview of how all the bits work then switching distro is (much) more straightforward.
Ubuntu is an excellent first choice because it's one of the major distro's so you'll be able to google stuff more easily.
My personal recommendation would be Fedora (and if you want a familiar windows 10 at least in approach GUI) Cinnamon which is excellent.
That'll ignite a holy war.
The trick with linux isn't to learn the flavour, it's to learn linux - once you get an overview of how all the bits work then switching distro is (much) more straightforward.
Ubuntu is an excellent first choice because it's one of the major distro's so you'll be able to google stuff more easily.
My personal recommendation would be Fedora (and if you want a familiar windows 10 at least in approach GUI) Cinnamon which is excellent.