For this tutorial we will login as a user with Editor access
1) Scroll down and to the left to login through the Login Form
Next scroll down to the User Menu on the left
2) Click on the Submit New Article menu item
3) Click on the Title field to select it and enter a Title for this new artcile
4) Next scroll down to the text editor, click in the text area, and enter your article text
Scroll down further to access the Publishing options for this article
5) Select the Category dropdown listing and click on a category to select it
Scroll down further to enter optional Metadata for this article
6) Now scroll up and click on the Save button
Now you know how to submit a new article in Joomla