Quick success is very very rare. In any field of endeavor.
It DOES happen. So beginners study those cases obsessively. Hoping that they will find the secret ingredient, the magic method, the coming trend.
Careful studies of those cases have come to the conclusion that often the sudden success comes along at exactly the moment there was a fertile environment for it. An environment which was not there the year before. Nor will be there the year after.
Those successes are “perfect storms” which happen when a dozen or more rare and innocuous conditions happen. They combine to create something much greater than the sum of their parts, an audience hungry for exactly the artwork available at exactly the right moment.
Usually if we look closely at the lives of successful authors we see a familiar pattern. Familiar because we have gone through it and are going through it ourselves.