You can send an email without first creating stories. Just go to "Emails" on the top menu, and click on the red "Create New Email" button at the top right. You'll be able to select which mailing list to send your email to, and write your message directly into the email template, even if there are no stories to include.
If you don't have a mailing list which you have access to, then you won't be able to send an Email. Go to the "Mailing Lists" tab and create your mailing list first.