Here's the link to the section you needed in the training portal: https://dovetailmktg.kartra.com/portal/mgsitlogin/subcategory/152
If you already have a Facebook business page setup and also know for sure you have admin access you can skip this step.
If you created the page yourself, you certainly have admin access!
If you have a Facebook business page that someone else setup you MAY NOT have Admin access, which is necessary. We advise checking that now.
If you do not have admin access you won't be able to use it. You can either create a new page now or ask whomever created it to give you admin access.
If you do have to ask for admin access, do NOT continue with onboarding until that has been completed.