Age of Marauders fans

Hi! I'm interested in getting into the Marauders fandom as I've heard great things about some of the popular fics such as AYTD. I'm in university right now, and I'm wondering if the fandom has a large demographic of university age and above fans? I don't really like being in the older age range of fandoms, so it would probably deter me if it was mostly high schoolers and younger.

Edit: Thank you for all the responses!! It's so great to hear that there is a wide range of ages and everyone seems super nice