This question is especially for people who have joined in the last week. Have you used other fediverse platforms or is this your first time really using one? What do you think of it so far? Are you aware that you can comment on Lemmy posts with a Mastodon account?
It’s a different thing. E-mail, Matrix, and ActivityPub are all different protocols. Mastodon and Lemmy both exist on the ActivityPub (i.e., the Fediverse).