I think engaging with people on a human level rather than giving unsolicited advice on how to use fediverse to every new face around could be a place to start. Half the time I see a new user here they seem to get flooded with technical advice that, while well-meaning, is somewhat off-putting.

A simple "Welcome! Don't hesitate to reach out if you have any questions about how to make the most of your time here" is plenty for most people. And if they do ask questions, go wild.

Is there a good community in which newcommers can ask basic questions, like a fedi help desk community/no stupid questions fedi edition? I feel like that could be useful to point people to. Edit: Blaze linked !newcomers@piefed.zip in another comment.