The Google Keyword tool is good and has it's place, but it is so limited. If you are serious about keyword research try Market Samurai. If you don't want to invest in a professional tool such as this, at least get their free trial and go through the video so you understand the importance of keyword research. If you fail on keyword research your site will be very lonely. Not a good place to be yet so many internet marketers fail in this important FIRST step.