Hi Tommaths, here are some general tips on discovering accounts to follow: https://fedi.tips/how-do-i-find-accounts-to-follow-on-mastodon-and-the-fediverse-how-do-i-find-my-friends/
Here are a few museum suggestions to get you started: https://fedi.directory/tag/museums/
Here are some library suggestions: https://fedi.directory/tag/libraries/
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