Korea: Warming Up Slowly to Seoul

It’s Day One in Korea.
I don’t feel like I’m suffering culture shock, so much as not-as-confident-as-I-thought shock. I just assumed that after having traveled around Asia a bit I’d totally be able to handle Korea. Instead, I find myself feeling pretty lost. I have no idea where I am, or what areas of the city are cool, what there is to do, or how to comport myself. I’ve done 0 research.