A few things:
1. From a technical standpoint one thing that would help if it is possible is for the fediverse versions to show up immediately once the wordpress fediverse account address is followed. It is pretty tough to say follow this account, now wait for them to post something new. Understand that this may be impossible.
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@pfefferle
2. Name some things. @tchambers has suggested "fediblog" for the wordpress fediverse address. It doesn't matter what you call it, but naming things and explaining to people in a short description how it all works is key. People just don't get it.
3. Perhaps some way to "log in" to the "fediblog" account on the Mastodon side and interact with it. Maybe to update the profile and reply to comments. Understand that this may be impossible.