Hello, thank you for writing.
Modification of the lifestyle is important. Diet and exercise are a great combination. Diet means a proteinic diet. Include more protein in your eating such as fish, chicken, egg, white egg, cheese, cottage cheese, milk, yogurt, more fruits and vegetables and less carnbohydrates such as pasta, white bread and rice, cookies.
Exercise. Do weight training because it build up muscle and the more muscle you have the more calorie you will burn. And combine force training with cardio. Also different sports can help. If you like disciplines of martial arts you can follow a taekwondo class, kickboxing, etc.
Best regards. If you have further questions, I am here to help you. Thank you.