Need to lose weight.

Anyone know how I can loose 30lbs. - 35lbs. as quick as possible? I’m 15 and I am this much overweight and my doctor say I need to loose it. He say that its going to be harder later on, if I don’t start trying now. He don’t tell me how, though. All he say is eat healthier, and that really basically it. I was also wondering if anyone would join me? Like buddies trying to loose weight or something.. Though, no one fakin it, please. I need someone who really needs help, too. Though, honestly at this moment, I would do anything to loose the weight.. Many at my church do a fasting thing, so I was thinking of doing that myself, even though, I am a little younger but only by a couple years, so I was thinking about doing the same. Plus, I hear it cleanses the body and all that, which just sounds awesome! Anyhow, please no bad comments on the fasting idea. But so if anyone NEEDS to loose weight and who is willing to join me, please message me. Thanks so much! Bye.