If you're looking to find your twitter follows on Bluesky: Sky Follower Bridge is a chrome extension that does just that. chromewebstore.google.com/detail/Sky%2...

Sky Follower Bridge - Chrome Web Store

Instantly find and follow the same users from your Twitter follows on Bluesky.

Pretty easy interface, just lacks a "follow all" button. Obviously check the names match up properly, because people can rename themselves!