Just to encourage you in your intention to lose weight let me tell you of someone who recently lost 24kg in less than 9 months, Quite a change from the time we last saw him more than a year ago - he said he decided it was time to get a grip when he hit 100kg in weight. He still eats exactly the same food he always has, just less of it - he says he simply counts the calories. He showed us a graph of his weight and from starting his weight reduction it was a straight line relentlessly down from then until now.
It is well known that eating more than one burns leads to weight increase and the other known feature is that a firm decision to lose weight is all it takes to succeed.