Theres some really rubbish advice on this thread.
Learn how weight loss works- about calories,- get some scales kitchen and bathroom
Learn what nutritiion does.- complex carbs, good fats- lean protein, fruit and veg 5 portions.- you wont starve and you cna still eat a bit of junk.
Learn what exercise does.- Do resistance training to retain muscle and increase fat loss. Cardio for your heart.
Learn how to change you mental atitude so you can combine all three of the above and maintain a realistic consistent calorie deficit to lose weight.