Going on a diet

I weighed 2.8kg when I was born. When I was a small kid, I was so skinny that my parents were very worried about my condition. My grandfather got some good information through his friend, and visited a traditional market and bought some frogs!!! I was less than 4 years old so I do not remember the situation. But If I had to eat frogs now, I am sure that I would refuse to have them.
Anyway, owing to his great method, I was getting fat and, from that time, I have been a fat person. Now I am over 100kg. Actually, about 2 weeks ago, I started to accept the truth and face up to this difficult situation. I decided to go on a diet which is something that most ladies do for their whole life.
I do not know the most effective way to lose weight. Even when I tried dieting, and then due to the yo-yo phenomenon, I went back to my usual state of being a "pig boy". Please let me know of any  super-duper, practical ways to stay in healthy and practical method.

Good text. I corrected your punctuation too, so have a look.  All the best, Michael