It is your life and you need to be positive and own it.
You need to sleep, drink water
and avoid sodas, fast
food and everything you know is not good for you. Understand that it is not a to do list that needs to be given to you. You have to take responsibility too.
The doctor will indicate to you based on height, weight, and present medical conditions how much you should be eating. Don't cheat, no pills, no powders and make this a life style change.