Besides the tech, there's all the stuff in the culture you didn't grow up with. The politics, the history, the wars, the fashion, anything like that. And you are also in a foreign country here. So double whammy. I hadn't really ever left Virginia, to be honest, before I came here. But that's not so different for me as it is for you. Even though wow big city. But hey, if I can ever help you with any of it, ask me anything. I like to help people out.