The Bible: Genesis Chapter 4

In Chapter 4, Eve has Cain. And Cain gets jealous of his brother Abel, and kills him. I was disturbed by the absolute lack of emotion and detail in Abel's death. All it says that in the field, Cain killed Abel. God punishes Cain in an odd way, he makes Cain a fugitive who cannot use the earth to farm (maybe?). Cain says he will be killed, however the birth of more humans was never discussed. Also, the reason as to why God would make it so that whoever kills Cain has vengeance sevenfold is weird. If Cain were to be killed, how are they killed sevenfold? The reading was boring, confusing, and left much to the imagination.