My recommendation would be to start with something benign but useful like low impact aerobics, swimming or bike riding. Exercises with a component of thumping such as jogging are detrimental to your joints and spine at the best of times and if you are trying to jog while carrying a lot of extra pounds then this is like jogging while carrying a backpack and will intensify how much damage one does.

As for living on Light and Easy meals ewwww yuk.
What I would recommend is cooking up some decent meals and then freezing some portions.

What I do re food is to spend Sunday evenings cooking. I plan what i am going to have for lunch and dinner and cook accordingly. Its amazing how easy it is to cook 2 meals at the same time.

As ever i am ready to take part in any bike rides etc or to be your personal trainer (and give you heaps of productive abuse)