Biting is normal for an 11 week old pup. You sound like you have no idea what you're getting into -- you should definitely read up on raising a puppy. Look up "bite inhibition". Google is your friend.
Never use negative reinforcement on the dog for biting -- always find a distraction that he likes better, and treat him with a cookie when he doesn't bite. With my Lab, I found out he hates orange peels, so I always kept one nearby in case he went after my hands.
Also, give them something to chew on...bully sticks when he's old enough, or they also love ice cubes.
It sucks when you're going to get something from the fridge and get bitten on the achilles tendon by them razor sharp puppy teeth. It takes a few weeks or months to get that behavior out of them.
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