<human>: Provide a brief overview of the text.

I'm 15 years old and have to go to school from 9:00 to 4:00. 
Breakfast: 2 slices of white bread with butter or rice snaps 
Lunch: white bread panini with optional fillings of cheese, pizza ,meditaranian chicken or Meatball. With caramel flapjack
Dinner: pizza, take away, or spag bowl.
Every day is the same combination of these foods. I do my best to vary it as much as possible but my parents are very reluctant to spend time picking out nutritious foods only for me (I have a healthy brother and 2 healthy sisters). 
I tried posting to fitness but my karma is too low. I was wondering if there are any tips or pointer for where I should even start. 
I am very guilty of eating way too many snacks that I really don't need. I have tried for the past year to try and find a comfortable place to start my weight loss but everything seems to come crashing down.
<bot>: what are your personal experiences and advice about losing weight with a very tunnel visioned diet and how did you start losing weight