Congratulations on your new puppy, and welcome to the forum!
Ears go up anywhere from 8 wks to 10 months, and they tend to go up and down and all around until they come up for good, so try to enjoy it and not stress about it! And take lots of pictures while the ears are dancing around, you'll be glad you did!
8 wk old puppies need to eat at least 3 times a day, but the amount varies because there's such a wide variety of foods out there. What food are you feeding your puppy?