Read the FAQs here. And follow the links for P1 FAQs to see what this is about.
Since you have tried other diets without success, give this approach a clean chance. So no cake, no chocolate, no fruit, very limited nuts for at least two weeks. VEGGIES are your friends. LEAN PROTEINS. Three meals a day, two snacks.
Breads, grains, potatoes, starches, even some veggies (carrots, beets) should be avoided for the early stage. Same with fatty meats.
Read about portions.
There is a lot to absorb, but you're among friends. Ask any questions you need!
"Foolish boy. Your powers are no match for the dark chocolate side of the force." - Darth Cadbury