offline account

Hi.  New Windows 11 machine and I want to setup an offline account - I don't want to be signed into my Microsoft account.  Dell has an article "How to Convert a Windows 11 or 10 Microsoft Account to a Local Account."  It says hold the Windows key and type r.  Then enter netplwiz, then select Add.  When I do that the Add is greyed out and cannot be selected. I also tried "Add Accounts" under Control Panel and it will not allow me to add an account.  It says that I cannot add an account because I am the Administrator. I have also read about how to accomplish this by reinstalling Windows. I would rather not do that as I finally everything transferred to this machine and all programs installed and working. Any help out there?