Help Me!

Okay, so this post is basically because i am getting really frustrated with my blog. For a while now I've been trying to change the background of my blog and also the colour of the main body. However no matter how many times I've tried it still will not change. I've looked on the Internet for any solutions of and still i have no idea of what is going wrong. If any of you have had this issue before and solved it please tell me by wither emailing me, which you can find on the contact page, or simply commenting below. 

Thanks for reading my blog, I hope you can help me and feel free to follow!♥