Try This
1.Eat 6 small meals a day
2.No alcohol,soft drinks.
3.No carbs after 17.00
4.At least 8 glasses of water a day
5.Walk at least 30 mins a day up to a speed where you can still walk and talk.ie don't walk so fast that you become out of breath and can't talk.
6.After about 3 weeks incorporate some weights.Metabolism is driven by muscle.The more muscle you have the faster you burn calories.
7.Once a week indulge yourself and eat whatever you want
8.Your diet should include 30% fat(good Fat)55% carbs and the balance in protein.
9.For a week before you commence keep a food diary.Record what and when you eat
IMPORTANT:before you start consult a physician