i want to start on a diet, do you know anything that could help me ?
Well the word diet implies the use of certain intake of nutrition for health or weight management. Which are you aiming for?
weight management 
Dietary habits and choices play a significant role in quality of life and health. It will be more of a lifestyle change to lose weight.
i can see that, what else can you tell me
A lot of people go with vegetarianism. Buddhists usually are but depends on their sect. Would you consider it? They are said to be one of the healthiest groups