I only started my friendica account this morning, so I have no idea what content looks like from there.

You can use Friendica in Mastodon apps, but you only have the functions that Mastodon has (i.e. only a fraction of the Friendica functions) You have full functionality in the web app and perhaps in the two apps that are specifically for Friendica (Raccoon and relatica). It is also best to go through the settings in the web app. There are many options to select which posts are displayed to you and how, etc. It's best to go through this at your leisure on a (not too small) screen / monitor.