I am new to hosted websites as well and wanted a blog. I did some research and found dropinblog.com. I personally think it is quite expensive but they give you a $100.00 credit which makes it not too bad (a bit over 10.00 per month)
It was pretty easy to setup... in OR you basically create a custom page... go to the page and enter HTML mode by clicking on the < >, paste the two pieces of code that they give to you... save
Then go to dropinblog.com and update the posts you want to have and pictures and the like. They even help you get the SEO optimized on the posts.
Like I said, I think it is a bit expensive but it does provide blog functionality with authors, categories, supports images and video, etc...
