You can find up to date and easy to use documentation on using the Divi theme, which your Sunday Streams website utilizes, at

This documentation utilizes short video tutorials as well as well documented instructions with clear images to quickly get you the information that you need to customize and build out your website.  While providing comprehensive details on each feature or section that you may want to use, the documentation layout lets you quickly navigate to the info that you need, often with your choice of video or written tutorials.