Step 1 - Connect Your Email Service
Click "settings" from the avatar dropdown at the top right corner of the screen, then click "Newsletters" from the right hand panel. Click the email service you want to connect to.
Refer to the following step by step tutorials...
Step 2 - Add a Newsletter Signup Form
On the page you're working on click "Add Section" from the side bar, then add the "Newsletter Signup" section.