it's not larping if someone is just a casual fan. not everyone is obsessed enough to be invovled in the fandom and know every minute detail of their interests.
the older i get the more i realize how important it is not to join fandoms for your favorite movies / shows / games / literally any media that means a lot to you. staying on the outside of the fandom and just interacting with fanart and fics is the best thing u can do for urself