Dating a younger guy?

I met a guy on Tinder & he’s 21 & I am 23. I have never dated or got to know a guy younger than me. I honestly thought he was 24 (at least that’s what his age was on the App) we went out on one date so far & it was nice. He seems very mature & respectful for his age. Works for the State, planning to move out next year. I mean he’s attractive.. 6’3, works out. I just idk I feel funny because he’s younger like he told me I’m over thinking it & I know I am but Ladies have you ever dated someone younger? If so how much younger was he & how was it? Is he too young for me? He doesn’t have any social media besides Snap btw which he doesn’t use much.. he told me he’s not into social media which could be nice tbh