Hi Lindy, welcome to 3FC
The SBD doesn't count carbs, so it won't be anything like Atkins. It's not a low carb diet. What you will do, though, is change the types of carbs you eat so you get the healthiest foods possible. You'll also change the types of fats you eat.
There is a thread sticked at the top of this forum called Emergency Handbook that will help get you started, but it will be difficult to do this without the book. If you can't buy a copy, I'd suggest checking out a copy from your local library, or even checking some local used book stores for an inexpensive copy.