No amount of planning, preparation, modeling, or anticipation is sufficient to predict the future in full resolution.
To know with certainty what will work and what will not, what you’ll like and what you won’t — there’s no getting around it: you have to build it, ship it, workshop it, launch it, do it.
And as soon as you do, you’ll learn. You’ll adjust for the next time. You’ll notice what you hadn’t previously considered.
But all this doesn’t happen with better planning. And it doesn’t happen in your head. It happens after you conclude the prep-work and you engage with the work-work.