ha-nul
Hey! Thanks for the comment. I'm actually teaching myself how to play it. I found a fingering chart on the internet (two actually). I find the first one to have less sharpness of some notes.
http://www.goamcan.com/imports/How-to-play-dizi.html
http://www.melodyofchina.com/12score/dizi_D_Key.PDF
In order to play the dizi, you must have three (or four) things: a dizi, membrane "reeds," a jiao (er jiao), (and water).
Unfortunately, I don't have any songbooks. I've found some in Chinese instrument music stores and on the internet though.
The Chinese music notation system is fairly simple, it's sort of difficult to describe though.
This might help: http://homepage.mac.com/matthewlspringer/Chinese_notation_system.html
Learning dizi in a month seems a bit urgent. I hope this helps. =)