Back when I started to write fiction, one of the things I struggled with was plotting my stories. I wasn’t alone there either. How to structure a novel is the single biggest challenge that I see most beginner and novice writers complain about, and with good reason.
The plot structure of a novel, more than anything else, will determine the success or failure of that novel.
You can have a cast of great characters, interesting settings and all the rest, but without a logical narrative structure to hang those elements on, your story will go nowhere, leaving anyone who reads it unsatisfied, if they even finish the whole book and don’t put it down after a few chapters.