This is where most people stop and decide that now is not the right time to start.
Imagine if you did start though.
You didn’t know what you would create as you wrote, but you would create something.
And that is the point.
You can’t create something from nothing, but the moment you have something you can work on improving it.
Marketing is the same. If you do no marketing, you don’t know where to start. There is nothing.
But if you have started marketing, no matter how small a step you take, you can work on taking bigger strides.
So the moral is start, and then you can improve.