Unlikely if you’re running Mint, it doesn’t install snap by default or even offer it as an option. And before you ask, no I don’t recommend you install it.

You’ll have either a native or flatpack install of steam

Highly unlikely - Mint has Snap not installed by default (it undoes the Ubuntu shenanigans), and while it can be installed and configured it’s pretty unlikely a raw beginner did so.

KDE is not a Mint supported DE and the KDE files are not in the Mint repos.

This can be made to work if you’re experienced but is definitely not a good idea for beginners. It will eventually break, and dependency hell is a thing.

For a KDE option suitable fir beginners, Fedora offers KDE as does Ubuntu, or there’s KDE Neon

Ubuntu touch project runs linux on a tablet while retaining the phone/android functionality

https://en.wikipedia.org/wiki/Ubuntu_Touch

https://ubuntu-touch.io/

https://docs.ubports.com/en/latest/userguide/install.html

https://liliputing.com/ubuntu-touch-mobile-linux-distro-is-now-based-on-ubuntu-24-04-lts/

There’s a list of supported devices there. Lenovo was one