Weight problem

Before I got married, I only weigh 90lbs, but as soon I gave birth to my 1st child, I gained double, well my fault too since I don't exercise, I just focus in taking care of my child and I eat a lot too, now I got 2 kids, still got the excess pound, so this year I told myself to shed those excess pound as much as I could, I want to feel light again, so hopefully with much determination I can loose and be back to my old body.