Sorry, proof of concept, i was being lazy

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While KDE plasma can be made to work on Mint (I’ve done it as a PoC) it is NOT something a beginner should be doing because a) it’s an unsupported config and b) you need to pull in non mint repositories to get the plasma files, and then you’ll be fiddling around to get it working again when an update breaks something.

If Mint has been troublesome then popOS ubuntu and Fedora would be better choices.