How to edit pages, and how linking works, e.g. how to make an episode-link that displays info about the episode when you hover it (I still don't know that)

That system is unique to this wiki (until I create it other places) but it is actually super simple to use. Just put the name of the episode in curly braces. {{No Questions Asked}}. That is actually how you call a "template" which is what it is doing. For other links, just use the square braces like any other wiki [[Ted Mosby]].

Okay, thanks. :)