Almost any fruit or vegetable is going to be calorically dilute enough to aid in your fat loss goals as it pertains to being in a calorie deficit. Choose more calorie dilute and Whole Foods in general. Lentils, legumes, beans, corn, peas, tofu, soy, tempeh. Oatmeal, protein shakes and smoothies, protein ice cream and bars. Some processed foods are okay, there's levels to processing as you know. Avoid very fatty foods with little protein to warrant eating it. Avoid cooking with oils or buying heavily processed foods with oil in them. Vegetable oil accounts for the most calorie dense "food" you can ever eat. It's also poor for insulin sensitivity and cholesterol levels, especially saturated and trans fats. Nothing wrong with putting a banana in your protein smoothie. Stay away from juices or sodas, stick to diet or 0 calorie flavored carbonated beverages. I use to think diet beverages were the devil but I couldn't have been more wrong in my thinking. Yote gave you good advice too, maybe right now you can just check out "Greg Doucettes" YouTube channel for now and watch or listen to some of his weight loss advice for free. I've been watching him a while, I like the educational content. So many people are ill informed, Greg is one of the few who actually comprehensively gets it. I hope that helps, don't forget to vote!