Somebody created a Facebook like UI for Friendica called Bookface (expand for pics&more info)

Credits go to @kmh for creating this style. It comes in both a light and dark version (check the links for usage instructions).

If you don't want to fiddle with code and stuff, loma.ml has already installed it server-wide, and should be available straight away for new accounts (If not, go to SettingsDisplayGeneral Theme Settings and change it from there. Or follow the guide in any of the links above).

Edit: loma seems to require invites. But, while in german, joinfriendica.de allows you to join without an invite. It also has quite a bunch of add-ons too like bluesky, tumblr, ifttt, markdown, langfilter (filters the languages in posts/comments) and curweather (shows the current weather).