You can take courses in high school or online that will teach you concepts that are important to video game design, such as Video Production and Animation. Adobe's website has a lot of free tutorials on how to use their creative suite, but their Creative Cloud software is not free. If your parents are willing to purchase a subscription for you, then use as many free online resources that you can find to self-teach yourself. Developing a portfolio of your work will be of critical importance for standing out as a desirable candidate, so start working on it.
I work in the IT field and a lot of time we have to seek out all of that free knowledge that is sitting out there on the Internet to educate ourselves and further develop our skills so that we remain marketable and in demand.