Congrats!
Speaking as a Dad of two girls, now 9 and 11 years old take lots of pictures and movies. This will be an amazing time for you, enjoy it, it will go by fast, before you know it she'll be in Jr High!
Have a lot of patience with the wife and/or mother and help as much as possible.
You're going to be the hero in that little ones eyes, more than you may now know, a tremendous responsibility to have, try as much as you can to live up to the role.
If I had it all to do again all over, I wouldn't change a thing!
Being a Dad 1st time and 2nd, was the best thing ever to happen to me, besides being a husband, of course.