1.  When I first arrived found no one spoke the language I did, I didn't know how to get anywhere and ask for directions.  At first I didn't want to go out and travel on my own because of the people and how they were pushy and shove as in getting on and off the trains.  Therefore, I never really wanted to go out because if not knowing what to do or even how to secure a train.  Sometimes they were just so crowded.
2.  in the first week I just only went to school and back, and never went beyond that.
3.  in the last 2 week I now know the city.  I understand the rushes that people are in and how they force their way on and off the trains and now I feel more comfortable and will be able to push my way on the crowded trains.
4.  I had to come to the conclusion that if I wanted to go anywhere I had to force myself on the train.  It's not rude to push people, because it had happened to me so many times that I no longer feel bad pushing people out of my way.
5.  Just the ideas of my personal space.  People here are much closer and it's just the sense of getting around and dealing with the people.  My personal bubble space has changed.
6.  When I return home I won't mind the large crowds of the staring people do.