There are many diets available to assist you in losing weight but I'd like to say a few words on behalf of an exercise program to go along with the one you chose. The additional weight you are carrying has placed additional stress on your heat and losing weight will help reduce that and an excercise program will help strengthen the heart muscle. You do not have to become a marathen runner or spends hours on a treadmill, 20-30 minutes a day with an accelerated heart rate will do wonders for your physical and mental health as well as burning up calories. You're doing the right thing  and following thru to a successful conclusion will add years to your life. Best wishes for success in your effort.