First of all, eat lots of low-calorie, high-volume fruits and vegetables crowds out other foods that are higher in fat and calories. Stock your kitchen with plenty of fruits and vegetables. Go for the Grain. By substituting whole grains for refined grains like white bread, cakes, cookies, and pretzels, you add much-needed fiber and will fill up faster so you're more likely to eat a reasonable portion. Have protein at every meal and snack. Adding a source of lean or low-fat protein to each meal and snack will help keep you feeling full longer so you're less likely to overeat. Eat breakfast every day. Choose liquid calories wisely. Sweetened drinks pile on the calories, but don't reduce hunger like solid foods do. Satisfy your thirst with water, sparkling water with citrus, skim or low-fat milk, or small portions of 100% fruit juice (it's very important, don't drink packed juice, it's better to buy juicer
https://houseandbeyond.org/best-juicer/ and make 100% healthy vitamin juice on your own). Good luck on this severe path