Immigration is moving out of your country and living in a different country; It is much different from going from one state to the other state. It involves a lot of paperwork, money and other miscellaneous preparations. Since your life before and after immigration is different in a lot of ways, it requires you to be strong both physically and mentally. In a nutshell, from the moment you sign your name in the immigration paper, you start your new life from Zero, nothing. In an extreme situation, you cannot use your degree or skill which you used to use to make a living in Korea. Living in a different environment alone can make your life unpredictable while you try to adjust yourself to a new social, cultural and legal environment. At last, there are several things for you to be aware of and know before you immigrate into America to make things easier for you. Without meticulous preparations and knowledge, you have to go through ordeal of immigration to adjust yourself to a different world. .
Expose yourself to an English speaking environment as much as possible and get familiar with it. Although a normal Korean college graduate studies English for 10 years, they always focus on reading and grammar. They never get a chance to speak it. Normal Korean parents who have high school student spend at least few thousand dollars annually on an English education for their kids; they learn English as a second language. So change your learning method and find someone who can speak English to you. In Korea , people study English to get a good grade. However, in America, People speak English to communicate each other. The English learning method here is focused on speaking rather than grammar or reading. People here don't spend too much money to learn a second language. It seems that they find a way to speak the target language which they want to learn. So, learn from the American style.