trying to set up email through google workspace... NOT through Homestead

I keep trying to follow the steps with Google Workspace (on my own, separate account - not part of Homestead and Google collab), but the step for authenticating my email is not being allowed.  I try to input the necessary TXT record for DKIM Authentication, but Homestead will not allow the TXT record name to be "google._domainkey" as it needs to be.

Please help!  I am almost want to ditch my website and start new elsewhere. But I am not quite there... yet. :(

~Tiffany~