Considering your comments, you are probably in a mindset where I’d recommend reading the funny named “How to Be Miserable” by Randy Patterson. https://www.goodreads.com/book/show/25898044-how-to-be-miserable
If books are too much right now, you can get a great summary by CGP Grey’s video based on it https://youtube.com/watch?v=LO1mTELoj6o Be sure to watch the footnote video after too (https://www.youtube.com/watch?v=8qGCAE1jte8)
You can put Lemmy communities in lists so they don’t spam your home feed. https://fedi.tips/how-to-use-the-lists-feature-on-mastodon/