What is the main conflict in Money: A Suicide Note by Martin Amis?

The fiction novel, Money, begins with a note from author, Martin Amis, describing the book as a suicide note from the main character, John Self. However, he does not know if Self will actually die by the end of the novel. John Self is the director of a movie, and this is the reason he came to New York City. He thinks about the people who owe him money, including Selina Street, his girlfriend.