There is support on the actual plugin page itself at WordPress.org. Look for the "Support" tab.
However, I would suggest that you use the Yoast WordPress SEO Plugin. It is incredibly easy to use and will help your website in many ways. You can set up your meta data for your home page, all pages, and all posts. It will also help you optimize every post and page with a handy dandy page analysis. You'll be able to find a lot of documentation on it too.
If you are already using the All in One SEO plugin there is an easy way to export your data to Yoast. It is a plugin called SEO Data Transporter.
Everyone has their preferences for an SEO WP plugin but in my opinion, and many others, Yoast is the best.
