Remember to take turns getting up 20 times a night... don't make her do it all the time. lol
You have received sound advise from our friends here on the org.
The three of you will be fine, it will all come natural to you both.
And yes, take as many pics and videos you can because he/she will be grown up and moved out in the blink of an eye.
You will practice the many things your parents taught you over the years on your children and think to yourself... omg I am now my parents!