The first build is a draft, not a verdict. Its job is to give you something concrete to react to.
Paste your brief and let it run. Resist the urge to add three more features while it works.
Expect the first version to be roughly eighty per cent right and twenty per cent surprising. That ratio is normal and it is workable.
Do not start renaming and restyling yet. Structure first, polish later.
Practice
Build once from the full brief before making any changes.
Try this
Screenshot the first version. You will want it later when you doubt your progress.