To create a new blog, click on "Create my Blog" on the right side of the page in the New_Blog pane.  This will allow you to set the general settings of your blog.  The Title should be your name in the format of First (Maiden) Last.  The description can be as simple as "My blog".  It will appear at the top of each blog entry you make.  Finally choose which options you want and click update.  It will take a few seconds for the blog to be created, so please be patient.  Do not hit the "Back" button on the browser if it times out or click Update twice.
To create a new blog entry, click on "Add Blog Entry" on the right side of the page in the New_Blog pane.  You will not have this option until you first create your blog (see above).  You can create multiple entries and they will all be tracked back to the parent blog for easy organization.