In Korea, people were poor.                                       In USA people are wealthier than in Korea.

In Korea, I wasn't allowed to do much anything.                  In USA there's more freedom to do stuff.

In Korean school, I didn't learn much anything.           In here, I'm learning much more useful things

In Korea, I had my family with me.                           Here, I don't have my family, but I have friends.

In Korea, I was sad and lonely.               In USA, I'm happier and I  can hangout with my friends.