Thank you for your question Littleshopper!
You can log into your Joomla Dashboard by adding "administrator" at the end of your url. Joomla is different than other CMS programs in that there are several steps to writing and editing your pages. We have a great resource at the following link.
Joomla 3.0 Education Channel
You would benefit best by reading the 102: Writing Articles in Joomla 3.0 section.