I really wanted to educate myself with personalising my blog myself so seeked out some sites to help me.
I found this one to be really great:
http://tips-for-new-bloggers.blogspot.com/
I was able to give myself 3 columns, originally two.. and used any colours I wanted by using the universal html colour codes and editing it directly into the html code. There was a lot more I did using that website, which helped me work things out too.
Also, with Etsy, you can request blog-design via Alchemy:
http://www.etsy.com/alchemy/ .. I've seen some requests there, and there are people that can do it, and will show you their previous creations.
But, I personally like to teach myself how to do everything, even if it takes hours.. at least then you have the flexibility to edit when you want, instead of seeking it.