(14) want to become vegan but goes against family's lifestyle/diet

I'm 14 and really want to become vegan after watching "what the health" but I'm frustrated because my family will not buy me the food I need to become vegan. My whole family eats meat and dairy products, and I can't help but to feel nauseous now that I know what they do to those poor animals. I feel guilty that I have to continue to eat these products because I am being forced to until I'm older. :( any advice or thoughts would be greatly appreciated. 😊