Got Denied my first attempt with adsense due to lack of content on site. Why?

I am completely new to this, and have been trying to soak in as much information as possible over the past month or so. This forum, along with many other sites have helped out tremendously.
However, I have run into a bit of a dilemma. I have been going through the basics of getting hosting, starting a website, etc. for the past 2 or so weeks, and have a website up and running. I have 4 blog posts up, as well as some static pages. I thought this would be plenty since I have read that some people only put up one article and start using adsense asap. However, I just got an email from google denying my request due to a lack of content.

My website is myquitsmokingtimeline.net (sorry I would have made it a link but this is my first post. Not allowed.) I'm just starting out with this, so if theres any feedback on what I might want to do to get accepted by adsense it would be greatly appreciated. Also, if I am doing something wrong with SEO or something else that might be effecting this, please let me know. The articles are all written by me personally. I have not done much SEO however, so I am not close to the first page of google. maybe I want to work on this first?

Thanks for the input.