Suggestions in blue.
When I came to The United States for the first time, I was very surprised because the United States is very different from my country. I'm from the Dominican Republic, which is a small country compared to this country. I was in the John F. Kennedy airport with my mother and my brother when I saw a police officer asking my mother a question in English, but she couldnít answer because she doesnít speak English. I studied English in the Dominican Republic, and I answered the question. At that moment I began to think that I would need to learn English to be successful here.You have a tendency to run your sentences together. Make more sentences. Make shorter sentences.
Student or Learner