Thank you for your question.
I am Dr Saha, I shall try my best to help you.
Common medical cause of weight gain is the thyroid disorder.
You can have an evaluation from doctor whether there is any such factor.
Exercise, strict diet control would be helpful.
Exercise involving belly muscles would help to reduce pot belly.
Take plenty of fruits, vegetables, water.
Regular walking is good exercise to reduce the weight.
Take fruits as a snacks instead of fried junk food.
High protein diet is good to reduce weight.
But you should not take it more.
Reduce fatty food and excess carbohydrate.
Weight loss needs to be planned in consultation with a doctor.
Working out & healthy eating habits, further reduction of calorie intake can be required.
Usually a calorie intake of 1200 - 1500 is advised when you plan to lose weight with an aim to loose weight gradually & to maintain it.
An involvement of a dietitian would be good option in planning diet.
You can get an idea from the website about planning your daily food.
I hope this information helps.
If there’s anything else I can do, please let me know.
If you are satisfied, please rate my answer as good or excellent.