There’s two types of fediverse basically.

1. Reddit knockoff

2. Twitter knockoff

Sometimes a #2 can post to a #1, they stand out because they always tag people and us hashtags in comments, when they manage to create a post, they never seem aware and get very very belligerent when people try to explain what they did that created a post.

If you want to engage with them on their level, you need an account on a twitter knockoff.

You don’t because everything here’s based on communities while Mastodon is on individual users. If you’d like something that does both in a single platform I think Mbin would be the best bet (although you can interact with Lemmy communities using Mastodon and other microblogging platforms to some extent)