What’s your GPU? Nvidia’s you will need to use the proprietary drivers, AMD it depends on how old it is but newer ones should be good with the default driver.
From the issues you mentioned on Ubuntu I think it’s likely you have an Nvidia since it doesn’t play completely nice with Wayland all of the time, which sucks because X11 is halfway out of the window.
Another thing I think you probably know but just in case, you can install different Desktop Environments on the same distro, no need to change distros for that. So you could install Plasma (and yes, Plasma is KDE) or Gnome on your existing mint installation.
Honestly I think Mint is great for beginners and if you’re happy with it there’s no reason to switch. One thing I always recommend though is keeping /home
in a separate partition so you can reinstall or switch distros without deleting your data.
I always find this so pedantic, yes, America is the continent but it’s also the name of the country, just like you probably say Argentina, Mexico or Brazil for the countries you mentioned instead of Argentinian Republic, United States of Mexico, or Federative Republic of Brazil. By that same token when you said United States I could have assumed you were talking about Mexico, heck until very recently in history Brazil was also named United States of Brazil so if I or you were old I could also asume Brazil. But I know what you meant by US and you know what he meant by America, stop being pedantic.