Sounds like you want a perfect, not good, set of goals. It's infeasible to choose a perfect setup up front -- try an agile/iterative approach. I think you're smart, so I believe in your ability to pivot later if you change your mind. And it won't be a disaster or embarrassment if you choose wrong.
You know how great writers say they clear their writer's block by just starting?
You know how great writers say they clear their writer's block by just starting?