Mint is modern Ubuntu which i started on Ubuntu in 2009 came back this year after windows 11 failed updates ads in start menu AI shenanigans. So i installed Linux mint its nice but it could be better.
Hence why I installed KDE Desktop Enviroment and if I didnt like it or if there were issues I could switch back.
The other choices where Endeavor Cachy Arch or Debian that i was thinking of trying later on.
What you’re proposing is an “unsupported” combination. In Linux, you do get “freedom”.
Yes, you can install KDE Plasma on Linux Mint. Depending on your setup, you might need to troubleshoot the issues for a good couple of hours, depending on your Linux knowledge. However, why would you want the issues? The combination you’re using in neither supported by KDE, nor by Linux Mint or ubuntu.
Just because you can, doesn’t mean you should.
If you want to build your system from the ground up, or swap DEs, minimal distributions like debian or arch will serve you better.
In general you’ll have the best experience if you use an operating system that was put together by experts.
When you take an operating system and swap out fundamental components for other ones, you no longer have that, and you become the expert who is expected to put it together properly.
If you aren’t intending to go on a quest to become an OS builder/integrator expert (which is really fun and worthwhile, but maybe not what you would prefer to spend your time on), then you should stick to operating systems where someone else did that work competently already.
Kubuntu is that for Ubuntu-based distros. Fedora is also very good these days. Lots of other good options, too, but that’s whole ‘nother topic.
You can also try MX Linux, MX.
I installed it once but did not really use it. There is a KDE version, it is based on Debian, so no funny stuff from Ubuntu.