Nope, that’s pretty much all you can do on bookmeter. And I think I remember some people saying before that the app doesn’t have that calendar feature too 
As for reading material for N3 level, I guess the beginner book club would be a good place to start. They have just started a book if you don’t mind being a week or so late:
If you want to read something on your own you can also check the list of books they read in the past, here in the main thread:
They do weekly threads where people ask questions about the reading, and you can still check them out for the books they’re done reading (and even ask some questions yourself if you feel like it).