Find files on sharepoint and schedule posts on pinterest

Hi, I’m trying to create an automation for Pinterest but I’m unsure how to connect sharepoint.

The idea is that the automation triggers when I add a topic to my google sheet, chatgpt then created the title and description. I add in a cell the name of the image for the pinterest post, so then this photo should be searched for in the sharepoint file. To have control, I want it to be drafted on pinterest when the checkbox is checked on my google sheet.

I don’t see an option to search for an image on sharepoint. How should I proceed to do this?

And does this flow make sense for what I am trying to do?