Hello, Welcome to Just Answer and thanks for your question. There are no tricks to losing weight. You just need to eat fewer calories than you use in metabolism and exercise. Where most people make their mistake is not measuring and weighing their food, since most of us eat 2-3 times as much as we think we do. There are some 1,200 calorie diets below so you can see the kind of foods you should be eating and the amounts. It takes 2,950 calories per day to support someone your age, weight, and height who is completely sedentary, so you would lose weight on a 1,200 calorie diet.
At 350 pounds your body mass index is 48.8 and you might be a candidate for bariatric surgery (either open surgery or gastric banding) if you would be interested in losing weight that way.