There are two ways to go about building a product.
The first is to plan every detail, including features, roadmaps, and deadlines, and then try and execute the plan as closely as possible.
The other is to pick the general direction and simply focus on the process instead.
The first approach can lead to a certain rigidity. This might work for big companies, as their time frames are usually much longer.
But startups need to move fast and trying to plan every detail can counterintuitively cause more delays (and stress).
If you simply pick a direction and execute, the product will be much more fluid, and you will be able to adjust your ideas and adapt to whatever comes your way.
Direction is often more important than speed in many areas of life.
For example, if you want to build wealth, simply working hard is not enough. Any ant can tell you this. The industry, strategy, and execution matter much more.
Keep an eye on the direction you are headed; the details will usually take care of themselves.