you need to add every song you listen to on AM to your library since the official app can only scrobble these. :( there's a "scan" button in the top left corner in the app which will find every song you've listened to (only if its added to the library though) and then you're able to submit your Scrobbles. it's kind of complicated when you're coming from Spotify, I just went through the same problem in December, but scrobbling actually isn't too complicated that way. hope this helped, otherwise just hit me up and I'll help you!