To the bloggers. When you first access your blog you will notice there is a post a comment added by default. This is just a default post to get things started in the blog database, but you can and should edit or delete the post and comment before you start blogging.

To change from the default (almost-spring) theme you would login to admin your blog and them select "presentation" from there you can quickly switch to any of the many (and more to come) themes. Your entire blog theme will change instantly.