I need a book designer

Hi,
I am in the process of completing a Photo Book in Black and White Fine Art style with a combination of text and pictures. For the last 6 months, I have attended an online workshop on book design, but I feel that I need a professional designer to go through everything for the last time.

I have made the book in Affinity Publisher and would like to keep it there. The cover, spine and back can be made in Affinity Design since that is separate files for printing.

What I need is a design/redesign of the front cover, spine and back cover and an assessment of the page design of the entire book. Hope you can communicate via Zoom, Skype or similar platforms.

I might also need assistance with online marketing if that is something you do.