Please correct me if I’m wrong, but from what I understood so far about the fediverse, someone can host an instance with only one community (or create a community in an existing server) not allowing posting, but allowing commenting and use it as a personal blog. Correct?

That way, Beehaw/Lemmy would be an aggregator of communities and personal blogs which conveniently one could see in the same feed (like in RSS).

Is it doable or is there another recommended way to keep your blog connected with the fediverse?