Take his advice don't give up....Listen, I own a website all about cannabis. I am currently writing a how to for growing marijuana. Its written for people like you, the absolute beginner. Someone who has NEVER grown a plant in their life. If you read it, and put it into practice I guarantee you will have a successful harvest. I still need to finish the last drying/curing part of the tutorial but by the time your there it will be done.
Eventually I am putting it into a book. Something like The Absolute Beginners Guide To Growing Cannabis - Cannabis Growing Made Easy
Anyways. Here is the intro. check it out
http://www.cannabis-country.com/2012/05/growing-101-introduction.html