Obedience class, pronto. And not the ones at petco or petsmart. A legit trainer who is experienced with your breed and issues is a must. This NEEDS to get under control. The more you let him push you around the more of a nightmare he will become as he gets older. Please take it from me... I see this in the clinic a lot. Owners can't get control of their puppies... then the dogs come back for their adult visit and they are so used to getting their way at home it's almost a nightmare to handle them... they're borderline aggressive, we have to muzzle them, takes 3 people just to restrain the dog because it has never been taught boundaries...

Obedience class, ASAP.

Daycare is not an appropriate avenue for teaching behaviors... it will only teach him how to interact with other dogs, not how to interact with you. Though, it WILL help wear him out so he is easier to work with at home.