First time in SubWay

The first time I came to IOWA, US with my friend Bora, I transited the flight in San Fransisco. I am so hungry, so I went to SubWay to buy a sandwich. I am shocked when the seller ask me what type of bread I want, type of cheese, Vegetable, and many other ingredient.


"I am sorry, I have no idea" I replied. "Just make a very simple one for me, Thank :("
Ho I don't know whether I did right or wrong to come to US. I feel that I came to the world that I know nothing about it. You can imagine, it's like a chicken come in to the duck's world. :)