Mac Mini M1 Reinstalling Big Sur Problem with establishing a computerAccount

I wanted a fresh start with wee Mac M1

Erased MacintoshHD and Data

Reinstalled Big Sur.

All well until Computer Account page.

Would accept none of my nine attempts with various combinations File Name, Acc Name and Password.

Shut down for a break

Restart stuck on page with nine possible File Names, no positive response withAcc Names/passwords

Cant move from this page

Help.