I will be ruthless losing weight...?

[BEFORE READING: I will do anything in my power to boost your reputation, status, whatever it may be on the INTERNET, if you read and help me out, seriously] Okay, so why I have made that title like that will be explained in a sec... So, I really need some help from you experts/people that have gone through this... I'm 16 (well in a couple of weeks) and I live in Australia... You may know that summer is coming up in December!!! I am roughly 5kgs overweight and have been overweight my whole life, but now, this time, unlike other diets etc, my mind is READY... and If you can understand these following measurements then you may be able to tell me more specific instructions; as said earlier I am 16 years of age, 6ft, 84KG, and broad shoulders with lots of arm muscle... but have a fair decent amount of flab on my stomach, and back area, and thighs... I will do any food diet you say... I will starve and only drink water if that's what the diet is... but I'm sure it's not to starve and not eat, lol. I have been doing this diet for a week - the 'caveman diet' http://www.cavemanpower.com/food/caveman_power_diet_stage_one.html. I am not sure if this is good for me, you think? So, as I said, I will do any extreme diet... although you may think otherwise, you're incorrect. I will add you on anything like MSN, or anything if you're willing to actually talk to me through an instant messaging thing... I do believe that I am finally ready to get the f*** in shape!!! Thank you heaps n heaps if you have read this, and reply....... x0x0