Fediverse

I want to respond to writing prompts, but from a separate account. That way, if someone enjoys a story, they can scroll through my (alt account's) history for more writing without needing to dig through all of the dramatic, vitriolic, shit-stirring my main account will be regularly diving into.

I was wondering if one of you wonderful people was familiar with some corner of the Fediverse perfect for this sort of use? Or would you recommend I create the account here on Lemmy?

• If I do go outside of Lemmy, I want to go somewhere capable of commenting on lemmy.ml and lemmy.world posts (in particular, commenting in the WritingPrompts communities on those servers).
• I would prefer to join a public instance, like I did when I signed up for Mastodon and Lemmy.
• Note: as mentioned above I have used Lemmy and Mastodon so far.

So: is there a part of the Fediverse I ought to be examining for this? WriteFreely, for example? Micro.blog perhaps?