If you'd like to add a new section to your wedding website, go to the Site section of your dashboard and you'll be able to directly edit your site from there.
Hover over the area you'd like to add a new section and hit the big plus (+) button.
The Add new section panel will pop up with 8 different types of sections that you can add to your website.
Go here to learn more about the different sections available to you.
Choose the type of section, add in the information, and save changes.