It's sounds like you want assurances now, before pouring in the years of work, sweat and failures. You want guarantees and validation now, then you'll commit? Is that how you want it?
Just know this: patience is greater than understanding. You need patience first. Be okay with uncertainty. Even the things you think you know aren't so.
P.S. Patience is greater than understanding. This sentence hit me hard. It's also the answer to something I'm struggling with. Time to take my own medicine.