Doesn't sound like agression to me. Dogs play using their mouths and it's sounds like she's not ready for bed but to PLAY!
And there is usually a bit of a honeymoon period when a pup is new but then when they get comfortable enough they they will start acting more normally and PLAY is pretty darn normal!
You see any of these sites? Even though she's not a teeny puppy, she missed this training but will be able to catch up WHEN YOU start the training!
Top Training Expectations for Puppies
Just starting up some great dog classes and WAY more fun exercise (miles of exercise) with a schedule will help too!
She wants nothing to do with kongs? What food are you putting in them?