Carmela - Things at first can be very confusing. But you've made a good decision. You may want to start off in the WLS section:
http://www.3fatchicks.com/forum/forumdisplay.php?f=78 People there may have some great ideas to help get you back on track.
The one thing I can tell you is that if you look at losing weight as a "diet", you're more likely to end up back where you started. Diets are temporary & fickle. This is about staying a healthy weight for the rest of your life. Find something you can live with. You can do this