Be sure that if there is one law about your body that you can trust to always be true, it is that excess is always unhealthy. Anything you do to the exclusion of a normal balance in your life is harmful to your health. This is especially true of diet. A Fruit only diet may be able to sustain you but over the long term it lacks the nutrition your body needs to function. If you want to reduce your weight below a normal level with diet I strongly encourage you to consult a nutritionist or personal trainer to protect your health.

Losing weight to improve your appearance won't do you much good if you screw up your skin or lose your hair because you aren't feeding yourself correctly.

Yes, I think you should consult a nutritionist who will give you sound advice about which fruits to take and the timing and quantity. They can also tell you about fruits which are fattening.