Ditto what vesteroid wrote. Just ride, ride lots, ride for fun, ride for errands or commute or just ride. Did I mention ride lots. Pay attention to what, when, how and why you eat. Control your diet. Ride for the fun or riding and the weight should come off. Studies indicate that all out effort is not the best at burning fat. My thoughts are that if you are starting where I started that any amount of exercise is a vast improvement. Once you become fit and accustomed to riding a bike for long distances or periods of time then weightloss slows and it becomes a matter of diet and a net calorie loss to keep losing weight.
Where the riding also helps is because it is so fun you may soon want to eat better to increase your power or endurance thus adding to the fun. If it is fun you are more likely to keep doing it. So just ride, ride lots. Good luck.
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Sir Mark, Knight of Sufferlandria