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.
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.