Welcome Alison to your Custom Dashboard.
This video gives you a Basic Walkthrough of your site and how to look after it.
Client Resources Page: Here you will find more detailed instructions for various tasks on you website
As you know, the WordPress theme your site is built through is called Divi. It’s super flexible and quite frankly, awesome. The more you work with it, the more comfortable you’ll be when editing text, adding images, etc. You can access specific training videos and documentation on the different modules and options by going to Appearance > Divi Training in the lefthand toolbar. These training videos are from the people who created Divi and are short and easy to follow. There is one for pretty much anything you would want to do. See image below.