Mint is the OS of choice for beginners. It's hassle free and it just works. Ubuntu is good, but its snap package got a bad rap when it was launched. It's not that bad. But it gets confusing since you end up with 3 different software packaging systems. (Apt with .deb files, Flatpak and Snap)

Personally I use Kubuntu, the KDE Plasma desktop version because it's so much more like Windows and has many more features. I don't mind the Snap packages, but I avoid them if I can if I can use Flatpak instead. Snap and Flatpak are essentially the same thing: it installs and runs software in a sandboxed environment which makes it safer to use.