Whenever I'm working on something new, my end goal is to distill it into the simplest version possible. Clean, readable, minimalist.
Usually, that process starts with chaos and complexity. Whether it's a coding project or a TTRPG concept, the genesis is the same. Throw together a whole mess of ideas, goals, questions, and inspiration. Then refine. Find parts that fit together nicely, trim the fat, leave no wasted space.
The same thing happens on the macro scale.