Welcome #NewUser
If you are coming from Twitter, you understandably may feel like it is a lot quieter here. Mastodon is not "dead," but there is no #algorithm bombarding you with stuff. Here you develop your own user experience by searching out and following people and things that interest you. You can pretty quickly build a much more satisfying experience, but it takes a little effort. Following #hashtags is a good way to get started. Be patient and join in conversations.