This is just a plug but - if you follow this account, folks from Mastodon will be able to see your posts, and follow you from there. There's no maintenance on your side needed! Likewise, there's a version of this acct on Masto so you can interact with them if they follow it.

Bridgy Fed for the fediverse@ap.brid.gy · 2y ago

Pro tip: you can find a bridged fediverse user by searching for their address (eg @gargron@mastodon.social) or profile URL (eg https://mastodon.social/@Gargron) here in Bluesky and then clicking the People tab. No need to figure out their translated Bluesky handle. Try it!