Congratulations on getting a puppy! They are so cute.
I am not an expert in animals but I will share what I have noticed in our own pets.
My father got a puppy 2 years ago, and she was up and about a lot but also slept during the day. My cat sleeps a lot during the day – more-so in cycles. But my father’s dog is 2 years old now and she still sleeps off and on throughout the day. It sounds normal to me. Remember, babies (while they are different than animals) need a lot of sleep too.