To avoid confusion, here's a step-by-step guide to putting your #Wordpress blog on the #Fediverse:
1. Log into your Wordpress site
2. Go to "Plugins", "Add New", search for "ActivityPub" plugin, install and activate it.
3. Go to "Users", then "Your Profile". Scroll down, and right at the bottom there's a new section called "Fediverse" with the blog's Fediverse address.
4. Share this address on #Mastodon etc, people will be able to follow it by pasting it into the search box and following it!