Six weeks ago you weighed 218, today you weigh 208. 10 pounds in 6 weeks is great! Don't be so hard on yourself, you are off to a good start
Weight fluctuates for a wide range of reasons, some of which have nothing to do with our fat. Water weight, not 'going' as often, etc. You mentioned losing 4 pounds the first week and most people do lose a lot more at the beginning of a diet. However, it's not usually fat loss, but a drop in water weight as we change our eating habits. Water can return, even if you continue to burn fat.
Those calorie calculators are not much more than entertainment. Our bodies are very unique, and we all react differently to activity and types of foods. The only way to find out how many calories your own body needs would be to go to a university or hospital that can test you. The easiest, and most affordable way is trial and error. Start out at a higher amount, and see what happens. Drop a little the next week if necessary. The goal for most people is 1 to 2 pounds per week, because this rate is more sustainable and it's most likely fat loss, and many people find that it's easier to maintain weight after losing it slower. Keeping it off can be harder than losing it.
Fruit is great! As long as it's whole fruit, not just juice - or dried and calorie dense. I always eat fruit for dessert or snacks. I choose the darkest fruits because they are usually higher in antioxidants, etc, which I believe are very important for my body. I load up on veggies for the same reason.
What else are you eating? That might be a clue. Do you eat a lot of fresh vegetables? Or do you eat processed foods, such as frozen dinners?