Cannot access admin console after Workspace for nonprofit approval

[AZFRAG]

I recently discovered that Google offers Workspaces for nonprofits without charge, and my organization qualified. I got approval early this week, which also associated my domain to my organization's gmail account. I can log in to Google for Nonprofits just fine now, and it shows Workspace associated to my account:

However, if I click that link to get to the admin console (or else navigate to admin.google.com), there's no account present (as shown below). If I try the "add account", I'm stuck in an endless loop trying to use the same gmail account that's associated with the above login.

How do I get out of this loop?

[KevinApodaca]

There is no world in which a name@gmail.com account can be an administrator of a Google Workspace tenant and use that account to manage Google Workspace.

Admin accounts and Google Workspace accounts are something@domain.com

[AZFRAG]

Well, my Google workspace account from the first screen is, in fact, a name@gmail.com account.

How do I add an admin account? 

Squarespace hosts my domain (used to be a Google domain), and in the setup process, I was instructed to add the mx record for Workspaces. So, currently emails send to my domain (@domain.org) bounce back, as I can't yet configure the Workspace. (Previously, I had MX records in place to forward to the @gmail.com account). I'm tempted to rewind that, and then I might be able to establish an admin account via the "add account" button on admin.google.com?