A bit on the pricey side but Will Wright's MasterClass is a great source. No fine math in it, but it's surprising how much complexity you can get from abstractions.
There's talk among game devs about cellular automata in SimCity, which I never understood for years until I saw the masterclass. But what that really meant was that a tile would affect only the neighboring tiles, for example traffic and jobs.
Paul Krugman also has an economics MasterClass, which covers trade and geographical economics. Also in simplified terms that someone who did high school math should be able to grasp intuitively.