It would be worth your while to get a copy of Dr. Atkins New Diet Revolution. I know a lot of the foods that I thought were low-carb, were not. Good luck on Atkins. That's what I am on. Congratulations on getting started.
You will be more successful if you are a little better prepared. Get the book, have the list of the proper foods, and make a list of only those foods to get at the store. Clean out the temptations you may have around... and go from there. If you try and start without this basic knowledge, you will only be disappointed. Don't do that to yourself..