I don't know if that idea is innate. When I was in high school, my composition was always like this when I was in my thirties. Now write a novel, which is several thousand words short and several hundred thousand words long. Even now, writing continues, and it may take longer. In short, if you are a person with a plan, you can write a general framework first, which is called an outline. Weakly speaking, I never write an outline, and I can finish a novel of 20W words in one month. My method is very simple, that is, stick to a clue, which can be the feelings of the characters, a mystery, an important event, a conspiracy and so on. And many plots are derived from this clue. Of course, to a certain extent, you can write around more clues, which will attract readers more. Pay attention, observe the things around you, observe the society, and collect more materials, otherwise it will be monotonous to write.
I don't support the writing that the ending of the story is fixed from the beginning, because everything is changeable. When you write somewhere, maybe changing the development of events will make the novel more perfect. The ending you want may not be suitable for the ending of your story, so be careful.
If you are bound by the ending of the story from the beginning, it becomes that you are playing with words, not that you are manipulating words. Also, keep a clear head and don't kill the people in the story when you are angry, which will make the readers angry.