A few years of difference looks enormous from below. Someone slightly older is close enough to be believable and far enough to be worth copying, which gives them a kind of influence adults cannot have no matter how right they are. You probably remember whether anyone filled that role for you.

No program or title is needed for this. Learn the name of a younger person in a place you already spend time, and take them seriously when they talk. Answer the question properly. Consistency matters more than intensity, because what they learn is that someone reliable noticed them.