I've been writing for years, mainly for high fantasy, so I might be able to provide some input. For when I've wrote stories of wizards and magic, I've often spent quite a while thinking of the answers to questions, although, sometimes the simplest answer may be the best one. Although this might sound cheap, sometimes it's best to just ignore things like how the economy works, as unless it becomes relevent to the plot, or a foreshadow for future events, then it isn't required for the plot.
Tho' if you do perhaps want to talk about some things that the events/girls won't be able to, maybe the magic history class could possibly be used? Where even if just a paragraph or two, flavour text could be put. It would be a natural way of transmitting such information.
(Nevertheless, I'm very excited to see development continue.