I found this website when I was first trying to create more engaging photos to promote my books.
Mark is the guy who runs this site and he has lots of great options. He has easy to follow templates, lots of different themes, and he has his own channels to show you how to use these templates if you aren’t as proficient in photoshop.
I believe he also has a paid service for cover art so please check out his work.
Order Signed Copies Here: https://goo.gl/forms/oyrOJ5BEBcKBn4DP2
Publishing Services: https://mailchi.mp/6631be0c687a/selfpublishingservices