Congrats on getting started on your first email! To create this email you will have to click Create from the Home or Campaigns tab of your account. This will then give you a pop-up where you will select Email.
Clicking Email will bring you to where you can view our email templates on the Standard tab in the top left hand corner. Here is an article from our Help Center with more details on how to create an email in your account. Once you have created this email you can check for errors, preview your email and send yourself a test to give yourself a chance to proofread. Then you're ready to click Continue and send your email to your contacts.