According to me your site is very informative, i like the contents of your site but you should have better images on your site and have a nice logo
You need to make your left navigation brighter, seems your header takes all the focus and if you want to make money you need the site to stand out more. Maybe use a lighter shade of brown and that could help dramatically.
You have got amazing niche but you should add more contents to your blog and use some nice images for your site great work