Babies are people, so they have as different characters as adults. Some babies will cry at night because they are hungry, wet, cold or just isn't used to the new surroundings. Talk to a pediatrician about this for professional medical advice.
I have 2 toddlers. I seem to come across the same issues. It's because there in a huge world am don't know how to react yet. They were just in your womb nice and warm not loud and no one touching them, now they feel scared that there outside the womb with all that to take in. It's scary being a infant. Good luck and god bless
If he sleeps most of the day, then it will just take some time to get his days and nights straightened out. He may be too cool or too warm... Try swaddling him tightly in a light blanket, this will simulate the confined space of the womb, and may be more comforting to him. They're all different, tho, so try to sleep when he is sleeping, so you don't get all worn out and lose patience. Good luck, mom!