Eat a full meal only once per day. Once. The old “breakfast is the most important meal of the day!” is a marketing scam to sell cereal. Eat an evening meal and nothing after that. If you can’t make it all the way through the day, have some tea. One meal per day and you can probably eat most anything you like.
Stop drinking all forms of soda pop. Switching to “diet” is just replacing the sugar with cancer causing ingredients. Stop it all. All of it. You still are keeping the same bad habit.
The whole thing of drinking 8 glasses of water per day, and constantly carrying a bottle of water with you wherever you go is another marketing scam to sell water. You don’t need it. Ask your doctor if you might benefit from a diuretic or water pill as they are commonly called, you will probably drop 10 or 20 pounds in a week or so. Drink a little water when you feel thirsty and quit that whole staying hydrated bullshit. You are already plenty hydrated.
Eat more vegetables. Steamed, raw, or roasted. No sauces, no ranch dressing, nothing. They will replace the space in your stomach and add few calories. In fact, give up all sauces and gravy on everything.
Calories are not the problem. Train yourself to eat less, less often. You can have your cake, and eat it too, once per day with your meal.