Get the writing, revising, and editing done and stop waiting for it to be perfect.
“We are all apprentices in a craft where no one ever becomes a master.” —Ernest Hemingway
If you don’t write it, someone else will.
The struggle is real, but these creative projects must be completed. The muse will not stop until the book is finished. Notice that I didn’t say perfect, I said finished. Finish it to the best of your current abilities, and then you move on to the next. From your head to the paper, get that story out, get those revisions done, get that manuscript done.