Choose several novels that you admire and read them like a writer to see how they were put together. Start with a chapter outline of the book that notes what happens in each chapter. Then study the outline to see how the writer had structured his plot, introduced characters, deepened conflict and danger, threaded in subplots, alternated dialogue and narrative, resolved problems, played with theme -- whatever strikes you. Take favorite sections out of these novels and copy them by hand -- this will bring you new awareness of the writer's word choice, rhythm, punctuation, the flow of his fiction. After you copy, rewrite the section -- play with it. Insert new characters of your own, change the dialogue, change one action and see how that changes the scene as a whole.
To find out how living creatures worked, scientists had to dissect them. Dissect books to learn how they work. Some people say dissection kills books. I disagree -- I say it gives books new life. And keep reading in this forum and other writers' forums. Read books on writing. Seek beta readers and writing partners. Above all, write every day.
There are no shortcuts -- art is long. That's why you have to love it.