Welcome to HCM.
First of all I would like to tell you to go slow on your weight reduction process. Donot loose too much too quickly. This will definitely harm your body. instead of your weighing scale keep your clothes the parameter. This is because even bones have weight and when one starts loosing weight, there are chances that there isn't any significant change in the weighing scale even though you may feel lighter and the clothes might get loose.
Daily exercise is a must. I would suggest Yoga
would be a better option initially as your body will easily bare the excess weight while performing it. Later you can go ahead with other exercises.
Inorder to loose your weight and maintain it, i would suggest that you should have your Lunch in proper quantity and have only vegetable soup in Dinner (except Tomato soup). At a later stage you can have everything you want, but in moderation.
I guess this would be enough for you initially. Feel free to contact HCM for your queries.