How your logo looks like?
How your cost structure looks like in detail?
How many units you're planning to sell?
What colors your company is going to use?
What exactly your margin is going to be?
How your business cards look like?
How many units you're going to sell in ten years?
Does all of this even matter if you haven't had a single sale, yet?
The only thing that really matters is to see if people are buying what you're selling.
And once you've successfully done that a few times, then you can go ahead and worry about the details.
The details are important.
Because they help you to optimize things.
But there's no need for optimizing things if there's nothing to be optimized, yet...