You need to go to the gym and set a strict diet plan for yourself. The most important thing that helps you lose weight is calories! Eating less calories than you burn will result in weight loss. Try to find our what your maintenance calories by using online calculator and work from there. Try eating that amount the calculator calculated and see if you lose or gained any weight the next week, if you do, decrease it by 5 - 10% and try for another week. If your weight stays the same, then congrats you've found your calorie maintenance. After that, you decrease the calorie by 20% until you hit a plateau.
When you do hit a plateau, either go to the gym and burn the calories (recommended) or decrease it by another 20% without exercising (not a good choice).
Your maintenance calories: 3000 kcal
To lose weight, you need to eat about 20% less than your maintenance which is 3000 x 80% which is 2400 calories. DO NOT eat less than 20% of your maintenance or you'll lose weight too fast and that's not good either.
So in conclusion, eat moderately, count your calories if you can and go to the gym to burn off more calories so you could eat more! hope that helps, cheers and good luck!