Passkeys and Passwordless

Has anyone seen or written a guide on 'how to get your mother in law, or grandparents, on passkeys, without them getting locked out of everything permanently'

How do we switch the least capable, most vulnerable and likely to be phished users to passwordless with the least amount of effort?

It needs to be simple enough to get them onto passkeys for their important stuff like emails and robust enough so they arent locked out of the passwordsafe/other important services …

cybersecurity everything guide law locked locked out passkeys passwordless phished simple switch vulnerable written