We have done this transfer multiple times. How "young" is the traveler?

In my experience, Terminal 2 to Terminal 1 can be more confusing than Terminal 1 to Terminal 2. However, both are generally well-signed. Keep in mind that the train is the same train that goes to downtown Minneapolis and the other direction; so, going too far does mean leaving the airport. Safety probably depends on time of day; but, generally, it seemed fairly safe to me.