Simon Sez

First and foremost, look on the left of the screen.

• Go to my blog
• Post to my blog
• View RSS feed
• Mark this blog read
• Blog control panel

All interesting and notable features. In particular, spend some time on the last item. Go through the blog control panel. There's a number of features for you to configure to your heart's content (categories, title/description for your blog, rights, access control, etc.)

Most of it should be pretty self-explanatory, but if you need help, ask for it (either here or on the help forum/project)

If you're wondering what differentiates blogs from forums (sorta)...go here