Hi and welcome to the boards.
At 1 week of age you will not get your DS on EASY as such as he is still too young to have much activity time, but you can teach him the concept of feeding, activity being just a nappy change and settling him down to sleep so that he falls asleep independantly.
I would not worry too much at this age as your son is still adjusting to being in the outside world and everything is so new to him.
That is fantastic news that he is doing so well during the day and is sleeping and settling well during the days.
Night time can be a lot different. It has been a long day for him, even though he has napped so well during the day, the day still takes it's toll on him. The late afternoon, and evenings are generally called the fussy period, and a lot of people say that they find it very difficult to get their lo's to sette. I can tell you that it does get better as your lo gets a bit older.
You and your wife are doing fantastically
for now just sit back, relax and enjoy your baby boy. Things will fall into place soon. Most babies don't actually get onto an established EASY routine until they are about 6 weeks old.
Please let us know if you have any questions.
Paula