How do I set up a Facebook account?

Please refer to Facebook's official documentation:

Instructions on how to set up a business manager: https://www.facebook.com/business/help/1710077379203657?id=180505742745347

How to add an existing page to the business manager: https://www.facebook.com/business/help/720478807965744?id=420299598837059

How to add an ad account to the business manager: https://www.facebook.com/business/help/910137316041095?id=420299598837059