In many years of teaching and communicating with other writers, I have encountered the Demon of Self Doubt many times. The Demon has blocked the path of many a creative from pursuing what they most love to do. Why? Because they become overawed by the vast archive of work already done, the ground already trod by the great geniuses of the past. "There's Shakespeare, there's Tolstoy, there's Georgia O'Keeffe.... What can I possibly do to top that?"
Another terror spread by the Demon is the fear that: "I am just too late at the table, that there so many writers and artists out there."
The Demon is a chimera and the fears he sows are baseless.
Sure, others have written novels, but they haven't written your novel. Sure, there are a million other creatives at the table chattering away. What does that have to do with you?
Make your own table, fill it with your own movable feast, and the diners will come.
Ernest Hemingway put it this way: "We are all apprentices in a craft where no one ever becomes master."