learn to cook healthy food

I really want to learn how to cook healthy food…and how to prepare healthy meals. I want to learn how many calories I’m supposed to have each day, and what foods have what calories…and the significance of saturated/unsaturated fats, sodium, carbs, etc….because right now it’s all Greek to me! I don’t understand hardly any of it. I want to learn what foods are good for my body and my health and what dietary benefits come from what combinations of food, and how to make that food yummy for not only myself but for others!