You should eat reasonable snacks when you're losing weight, for two reasons. First, it's best not to let yourself get too hungry or you will be tempted to overeat. So six small meals will be better at keeping you satiated than three large ones. Second, you need to give yourself permission to have snacks. Many people find comfort in knowing they can have that bedtime snack, albeit a small, reasonable one, and that they are still making smart choices for their health.
One way to help yourself lose weight is to eat sugar. Actually, what I really mean is to avoid sugar substitutes. Fake sugar can cause real cravings for sweet things and too many of those can cause weight gain or just curb your weight loss. Some sugar substitutes can also have nasty side effects. So go ahead, eat your sugar, just do it in moderation.
You have read a lot of information on losing weight. Learning how to eat right is extremely important, as the saying goes, "you are what you eat." You also learned that exercising plays a big role in losing weight. Take your time and make sure not to overdue anything, or it will cause a set back.