Avoid junk food, fast food, fatty food and sit with a
dietician to make a
customized diet chart
for yourself and follow this religiously.
I would suggest you to talk with a physical trainer and start doing different forms of cardio regularly. 30-45 minutes of dedicated cardio over a period of time will make you lose weight, you can do jogging, cycling, swimming, cross trainer, treadmill, running, skipping etc.