If you created a Google account via the Blogger email invitation, you will automatically be logged into Blogger. (When you return to Blogger in the future, follow the instructions below.)
Point a web browser to http://www.blogger.com/. Enter your username and password in the upper left-hand corner of the screen:
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Once logged in, you'll be redirected to the Dashboard. As the metaphor implies, the Dashboard provides an at-a-glance overview of your blogs and account settings. The blog for your team should appear on the 'board:
(Click for a larger image.)
Next, we'll create a blog post.