So you don't like comic cons (they have other things at those events besides manga and comics) but you know the language the NPCs speak in a video game?

You should honestly fit right the fuck in at one of those. Honestly, the awkward self-pity already does. I meet so many people who are incredibly shy/awkward/what-have-you show up and it's actually their first one, and they always end up having an absolute blast.

You're surrounded by like-minded people who are just there to nerd out and have fun with their community. And sometimes the costumes can actually be amazing.