Nice idea! Actually I have something “similar” in my mind… but that’s another topic.
What I suggest to think of is some kind of reward, to run your mod. So far it sounds more like a “punishment” to install a mod which consumes your resources and provides a debuff if you don’t support the king. How about a buff if the king is happy or some unique units?
At the moment the “API” is very basic, i.e. you have only overrides and mixintos. More will come for sure. However, you can start getting into it step by step. Maybe you can split your mod into small chunks? Modelling the king could be step one. Creating some animations could be step two (which will not work with Qubicle, you will need something like Maya or Blender).
I would (and am doing that) try some basic mods first to understand how it all works. Take it from there. I have wrote one or the other tutorial… as a starting point if you like: