Try eating SMALL meals throughout the day that are balanced. Say about 4-5 times a day to include high protein, complex carbs and moderate fat. Eat more green, leafy vegetables (salad, spinach, kale, broccoli, cabbage, sprouts, cauliflower, asparagus, etc.) than fruit and starchy veg (corn, peas, potatos). Eat whole grain breads, avoid sugar and refined foods. Avoid convenience foods.
Drink 8 - 10 glasses of water. Every day. That is the single most important thing you can do.
Exercise moderately, walk 10-15 min a day, every day. As you become more fit, extend the walk to 30 min or more.
Stick with it. This is the hardest part.
Bon chance