You're going to die /s

In all seriousness just use some common sense and you'll be fine. Follow the usual big city (of which Springfield is not) guidelines of avoiding walking on streets that are empty late at night, mind your surroundings, don't flash valuables. Since you'll be around campus mostly you'll be fairly safe. MSU has a pretty robust security team and the neighborhoods around that would be a 15 min walk are filled with college students and generally ok people.