I've been writing a fantasy fiction novel and I have the ideas for two more books to follow it later on. I read from another writer that their first book did not get published and they used that novel to gain experience before writing a more grounded, realistic book. I've put years into my novel in progress and there will be more years to come. I want to get this book published someday. It seemed to me that if a book didn't get published, the person moved on and wrote with another plot and idea. So if I wanted to seriously get my first book published, would I just have to rewrite it over and over until I had fixed nearly everything so it would become perfect to get published and out on the shelves?