Well for country I would live in Germany as back then the language was close to modern english and I would pretty much go through towns killing people using modern methods to get away with it like killing all witnesses or framing somebody else. Or I would scare people out of religion by telling them that nothing the church says is true and nothing will happen in the next 1000 years. Or I could become a writer, not many people were literate back then so that will be a bonus for me. Or I would join the army and use modern tactics that I know of to win battles or I would join the side that I know won the most battles. But I'd probably be killed as a wizard or something anyway becuase the fundamentalist people will think I'm crazy. So pretty much I would cause chaos