@Total Sonic Media With a Friendica account you are automatically connected to Mastodon and Diaspora. You can also communicate with #Bluesky if you activate the connector.
I can only find a German guide about the #BlueskyConnector at the moment: Verbindung mit Bluesky herstellen

Addition: the #Friendica instance must also have the connector for Bluesky activated, not all of them do. You may need to take this into account when selecting an instance.
It is displayed when you click on the ‘i’ on the start page of the instance for information about the instance (addons, blocked instances, imprint are displayed there)

It's much easier.

Friendica, Mastodon and now also Diaspora belong to the Fediverse, so they are in the same network.
Friendica and Mastodon are just different software solutions in the same network.

If you want to use Fediverse, Diaspora and Bluesky with one account, you should switch to the Friendica software solution, which can use all three networks natively

- I use Friendica already, will look into cross posting from it.

You don't have to crosspost between mastodon, Friendica, Sharkey, Pixelfed etc.
These are all services in the fediverse, if you post with one of these services, everyone in the fediverse can see it, no matter what software they use to access it.

I, for example, write to you via the account #Calckey