Systems honestly aren’t my area of specialty, and whenever I do talk about them, I get dragged into the old argument of whether or not endogenic systems are allowed to exist. So I don’t have all that much in the way of actual resources. However, I do have friends who are systems, and likely can help you more.
I’d start with @/captain-s-mindfang if I were you. Felix’s been around for a lot longer than I have and they probably have more resources for you. That and they’ve seen everything including the kitchen sink, so it’s unlikely you’ll have something they don’t know how to deal with.
Hope that helps a little.