Indie Bookstore Needs Help Setting Up Square Online Store

Hello! We are a small indie bookstore in Nashville, TN. We are changing our website from WIX to Square Online so that our online inventory will be perfectly synced with our in-store inventory. We are running into problems trying to set up the website because we need to majorly clean up our Square POS item library by making sure the inventory is accurate (importing stock count spreadsheets and deleting duplicates/old things we don't need) and so far, our biggest problem: making sure most items in our library have a book cover image attached. We made it pretty far on our own but Square's inability to allow for bulk editing is making us crazy. Bonus: We would love to have some sort of automation running in the future that can upload book cover photos immediately to square when we scan in a new title, so we no longer have to do that all manually. If you have any ideas or think this is possible we would love to set it up.