Kind of… The problem with full DEs like GNOME and KDE is that they pull in a lot of dependencies and make a lot of changes. So it can break visuals or change icons in each others environments or install apps with duplicate functions. Something like i3 has a lot less clutter because it expects the user to build their own environment.
The best way to try out KDE would be to install it under a new user on your system so it doesn’t conflict with your original home directory. Or you could boot up a live image of Kubuntu or some other KDE flavored Linux distro and mess around with it a bit to see if you want to commit to it.
While you can install KDE on mint without issues (apt install kde-plasma-desktop) I would recommend installing a KDE focused distro because sometimes they have better default configs.
But Plasma should be able to do win + arrow keys out of the box and current versions of Plasma should have basic tiling functions by dragging a window around and holding shift. If there’s anything you don’t like it’s a very configurable platform.