You are going to be fat from each food that contains energy if you will eat more than you need.
You should eat frequently and small amounts of food. When creating your own meal plan, use food composition tables. This tables provide details of the energy (calories), protein, carbohydrate, fat of various foods.
Soon, you will realize that it doesn´t pay off to eat chips, donuts, pastries, all kind of fried foods, snack foods, processed meat items - typically "fast food" It doesn´t pay off because you can eat only very little of these foods (if you are serious about losing weight) and after eating these kind of foods you will be hungry.