There are a lot of ifs in what I’m about to say, but IF you were using Apollo to browse Reddit previously, and IF you downloaded the JSON file containing your local data, Wefwef allows you to import that and automatically search for communities with similar names or content to the old subreddits you subscribed to. It’s saved this Reddit refugee a lot of time in feeling comfortable here.

To add to the other replies, try the Lemmyverse search engine, too.

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There’s also https://redditmigration.com/

I would agree with others, https://sub.rehab/ is the best place to go.

https://browse.feddit.de/ would be another one.