Funny you should mention that...
You can actually turn your WordPress blog into a Fediverse server extremely easily thanks to the ActivityPub plugin by @pfefferle:
https://wordpress.org/plugins/activitypub/
This allows people on Mastodon etc to follow your WordPress blog directly.
No linked accounts or crossposting or anything like that, the blog itself would be its own server and Fedi account.
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.