That's a good sized baby.
I've got 5 myself. Our latest, born in March or April or May--hell, I don't know, but we named her Sophia. I call her Sophie because the extra syllabel is a lot of work.
The first one is the hardest because you don't know what the hell you are doing. Our 5th we barely notice because there is so much going on. And we're older and don't give a shit that much. Evey baby has done exactly the same thing so we know more what to do.
You'll leave the hospital and be surprised they let you go because you don't know a fukin thing about what you are doing. I know the feeling. Just remember these few simple rules
#1 babies cry
#2 they don't know you exist
#3 people will say they look like you--even if you were black and the baby was japanese
The #1 reason babies cry is that they are tired. Try to feed them. If it doesn't work, zip them up in a sleep suit and put a door between you and them. It's hard to remember rule #2--they don't even know you are there. People get angry with their baby because they take the screaming personal. It's not. Put a door between you and take a deep breath. If babies were delicate there wouldn't be 6+ billion people on the planet. Let the baby kick its own ass--and it will. Don't try to kick its ass. It has no brains--a tiny little head with nothing in it. They are born many years before they are people. They have a cry designed by nature to not be ignored, but it isn't personal. They might take you and your relationship to the edge, but only if you forget the two first rules.
The third rule you can't do anything about. You could dump a bucket of fish guts into a baby buggy, push it through the park and 15 people will exclaim that it has your ears.