The First Draft's Only Job
A first draft has one job: to exist. Not to be good. Not to be publishable. Not to impress anyone, including you. Its job is to take the story from nonexistent to present on the page so that revision has something to work with. Writers who approach the first draft with any other ambition tend to stop and rewrite early chapters repeatedly, which is a form of avoidance. The first draft cannot be revised until it exists. Getting to the end of the draft, regardless of quality, is the only success criterion at this stage.