I am about to throw the computer out the window!

I am SO not a computer literate person and to even have a blog is far out of my element...but I love it and am trying to branch out and strive to something different. ANYWAY, I really love looking at other mommy/family blogs and seeing how creative they are etc...well, last night I came across several that had links to thecutestblogbackgrounds.com and they had pretty Christmas backgrounds and awesome Christmas music playing...I spent 2 hours trying to get those things on MY blog. As far as I can tell, I did all the steps just like it said, but it would never work! I need someone to help tell me what I did wrong.