Clarity comes through action and experience. Thus, you should focus on getting started and taking action more than you focus on the perfect end result. Optimize for the starting line instead of the finish line.

Instead of committing to a giant, year-long undertaking. Commit to something small and simple so you can get started and get some experience. Then, when you have more clarity about what you are doing and working on, you can continue to mature and build upon that idea, or you can pivot.