I know the first three chapters are all important and I am wondering what people think about introducing the 4 major characters in the first chapter, so having a bit about the background of each one? I am just not sure whether this would go against standard structure of a novel, and would be too bitty for a reader to absorb. The whole book is finished, so it wouldn't be hard to move things around. There is one main protagonist in the book, with 3 other major characters who impact hugely on the story, who do not know each other.
Thank you!