I have quite a bit of tutorials on my website on how to use Divi to edit your website if you want to check them out. Some I created myself and others I grabbed online. They cover page editing, to creating a new page with an already built template, to saving a page design to use on another page. I even have one or two on how to check your website traffic.
I use Divi from Elegant Themes to build all my new websites and I love it. When I was first starting out years ago, I knew a bit of HTML and used Dreamweaver and Photoshop, but that is not necessary anymore. Photoshop is great for image editing and I highly recommend it, but with Divi, you do not need to use an extra software program such as Dreamweaver to code and build a website. I love the visual drag and drop editor which lets me see my design as I build it. I know there are reasons for coding a website by hand, but I just do not see the benefit over designing in real-time and not having to look at a single line of code anymore.