It depends on where I am traveling, but I feel safe when I can use subway. The way of using subway is very similar wherever you go. Buying a ticket, going to the right platform and riding one and taking off at a right station. I have been travel to many different cities and most of the subway systems were the same. But sometimes when I try to take bus I don’t even know how to buy a ticket. I pay with cash or card in Korea. I paid cash but no change was given in LA, California. When i went to Rome it was even harder I needed to buy bus tickets at a tobacco store, and I couldn’t find right tobacco store. 😭