Welcome to the Beach Chrystee.
I agree that when I read about the SBD first two weeks it did sound a lot like Atkins first two weeks. However, the biggest difference I found on doing it is that you are not limited to a certain number of carbs a day. You don't count carbs at all just stay with the approved listing for P1.
Beans are your very best friend in the world on P1. Very filling and very good for you. Lots of WATER is very important also along with exercise. Even if you only go for a walk you need to do some kind of exercise. Also you need to make sure you are eating 3 large meals and 3 snacks each day.
Make sure you check out the receipe board. Lots of yummy things that I wouldn't have thought of on my own.
My biggest problem was making myself eat enough. The chicks here will tell you that you need to be eating at least 1200 calories a day. Doesn't sound to hard until you start eating from the P1 listing only. If you aren't sure how much you are eating go to www.fitday.com
and you can record what you eat and what your exercise habits are.
Good Luck and check in often. These chicks are great!!