As we move towards our goals, things change and new insights become available. Things always change when we begin to understand what we couldn't make sense of before. As a sensemaker, the most important skill you can learn is to adjust your course to accommodate new forces as you encounter them on your journey.
Don't seek finalization. Trying to make something that will never change can be super frustrating. Sure, it's work to move those boxes and arrows around as things change. But that is the work, not a reason to avoid making a plan. Taking in feedback from other people and continuously refining the pieces as well as the whole is what assures that something is "good."
Perfection isn't possible, but progress is.