Yeah, it is not impossible, but you are actively going against the maintainers choice of software and configuration, that they can assume you have during every update. That is what makes Arch so popular: no handholding that would get in your way; but also no helping hand from upstream, only documentation how to do it. Cinnamon is maintained by the Mint team and considered difficult to install anywhere else. IMHO when you are used to KDE, it can feel lacking.

Mint has no KDE install which makes it a hazzle to setup and fragile to upgrade. You also wouldn’t gain anything, because they are both ubuntu based systems. Not worth it imo, like a sidegrade.

You can transplant your desktop onto anything, the configuration is stored in .config and .local in your home folder. Bring those to another distribution with the same software (copy while you are not logged in, ie while in live cd or reuse the home partition without formatting) and it will look the same.

I recommend fail2ban to stop the automated attacks that are the background noise of the internet. It will set your firewall to block certain ip’s for a while, especially ports 21/22 are getting hammered with dictionary login attempts. And port 80 and 8080 for example get constantly version checked to see if you are vulnerable with an old apache, old dokuwiki etc, so don’t expose more than you need to and maybe learn about ssh tunnels and close a few.

I once installed ossim in a small network with a server and it showed me it is war out there, scripts flying everywhere.