I am hoping not to sound too much of a nitwit, but I am completely not understanding how mods are supposed to work on Cities Skylines (or Steam at all for that matter). I find confusing information: some sites telling me to download files (which ones?) some hinting towards subscribing to be enough (I guess...)
To be a little more specific, all I want is to be able to use the right mouse button to pan in the game. That's it. I found this mod that supposedly does that, but there is nothing I can download, so I subscribed, and started the game. Nothing. Nowhere anything about mods at all in the game.
Another option would be this mod, which seems to be a little more recent, but same problems apply here.
In short, how do I install mods (or manage them) in Cities: Skylines?