Distro - System level stuff. A “type” of linux. Mint, Fedora, Arch, Ubuntu etc.

DE (Desktop environment) - Surface level stuff, i.e. how it looks, behaves, and often what default apps you use for basic stuff like text editing. Gnome, KDE, etc.

Distros have a default DE but often provide different versions using others for people who prefer them.

You likely won’t need to interact with any of that other stuff except flatpaks. Just think of it as a form of distributing and running software.

Actually great news! Really like the feature and was consistently annoyed when you had to fall back to Google for those languages.

Jesus christ