Great Gatsby chapter 1

To be completely honest I didn't understand a lot of chapter one. The green light at the end of the dock is something that i will always know from The Great Gatsby because in black ops 3 zombies there is an easter egg. the zombies map is based around the same time as the Great Gatsby so on a part of the map there is a dock and at the end of the dock theres a green light.other than that i know that theres a guy named nick that moved to new york and lives in a box surrounded by mansions. i also know that this is Gatsby's story through Nicks eyes. Its hard for me to pay attention to the begining of a book so that about all i know.