Side Character Syndrome, Chapter 1

It's the classic transmigration setting: after reading a historical webnovel, Kevin Guan gets transmigrated into a world of magic and sorcery in ancient China as a useless side character. It's fine. The situation isn't even as dire as the stories he read. He knew the basic plot, he didn't even get a terrible death end. He can make it out alive if he can solve his one problem: he can't speak Chinese. Forget navigating the plot! How will he even navigate to the bathroom?