I'm 18, skipped a few years at school, and I can feel age discrimination in most of my interviews where people are 23 at least.
Have you been anywhere in this kind of situation? How far do you think it can go?
Don't worry about it. Build strong skills, a good reputation, portfolio and keep on networking. The rest will follow.
You could also create a startup to use your age and discrimination story as an advantage in self-promotion and marketing. Tech sites will love it.