If you don't really play a lot of sports I would try to stay away from carbs because they are the hardest to digest. But don't cut them out all together because you need them and if you don't get enough then it can lead to lack of nutrients that will effect your short and long term health.
The biggest mistake that teenagers make is not eating. DO NOT DO THIS because most likely it will make you put on weight.
I recommend that maintain a healthy diet and regular exercise you should be all good. If you have junk food around the house thats okay because its not a crime to have junk food, but you can ask your mum to limit the amount.
Hope this helps you