Welcome to your website! 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.
If you find yourself wanting to better understand WordPress or more in-depth tutorials, I recommend this site: www.wp101.com. You can also google your questions on YouTube and find hundreds of walk-through videos. But feel free to email me with any issues or questions you may need at firstname.lastname@example.org