After you have joined, go to the main Blogs page by clicking on the 'Blogs' tab at the top of the screen. On the right hand side you will see a colunm that has a section called 'Blogs'. In that section you will find this link: Blogs on this Site click on this link and you will see a list of all blogs on the site. Find your username which might be on the second or third page and click on it. This will bring you to your empty blog. In the right hand column you will see a section called 'Common Tasks' with a link called 'Write a new Blog Post'. Also under the 'Common Tasks' section is a 'My Blog Dashboard' link which will give you many more options to change the blog to your liking.