Three or Four main keywords should be used throughout the website.

book design (good)

graphic design (not truly a search word for you – too many competitors – doesn’t target for just your types of customers)

project management (no)

customer service (no)

https://www.google.com/search?client=firefox-b-1-d&q=book+design#ip=1

https://www.juliekaren.com/blog/what-your-designer-needs-to-know-book-cover-design

Change the menu to Professional Editors because Editorials kind of sounds like a newspaper content.  The page talks about Editing Books.