After you read, if you are confused, the following websites may help you:

http://www.sparknotes.com/lit/gatsby/

http://www.shmoop.com/great-gatsby/summary.html

http://www.gradesaver.com/the-great-gatsby/study-guide/section1/

http://www.cliffsnotes.com/study_guide/literature/great-gatsby/summary-analysis/chapter-1.html