Just place your content where it says “sample”. To change the color of the menu bar, go to the edit HTML section of Blogger and press Crl +F. Copy this code into the bar that comes up, and it will take you there. Then replace the HTML color code with one of your choice.
To download Harmonium, please right-click on this link and hit “save as”. Then, open the document (it’s a .txt document), and copy the code in it. Go to your HTML and check “expand widgets”. Then, replace that code with this code. Blogger will ask you whether you want to keep your widgets that you had previously – I’d definitely advise yes, unless you’re totally stripping your blog.