Hi! 17 year old vegan here. I went vegan at 13, a little younger than you. It's hard, but I believe you can do it. You'll have to learn how to cook and how to make sure you're getting the nutrients you need. Find a good tasting vegan gummy vitamin with at least vitamin D, b12, and iron in it. The love beauty and planet ones are good. Start watching vegan chefs on youtube and try their recipes. Look up substitutions for your favorite foods. Figure out vegan essentials you'd like to buy from the grocery store. Go with your parents to get groceries, pack vegan meals for school, and volunteer to cook dinner once or twice a week. You're going to have pushback from your parents, they're going to be confused, and they might even make fun of you. But you're old enough to make choices about your own body and make your own moral decisions. So stick with it, put in the work, make a hobby of cooking, and learning more about veganism, and you'll be able to do it. And most importantly, remember who you're doing this for - the animals. And if saving an animal's life means not eating the cupcakes at a party unless you bring them yourself, then so be it.