Oh dear! There are several good books I've seen recommended, but I don't recall their names. Welcome to basenotes anyway! I have done all my exploration on the internet, basenotes, and my own nose. Nothing really beats sniffing and sniffing! If you go back though this forum, I recall some very good descriptions of the fragrance families. I hope you enjoy yourself here. I certainly have!
Some of the crowd that usually responds to these questions are busy studying for finals, I suspect. I've had my final final many years ago--hence the unfamiliarity with books.