Step by step to save an image and get it's xano url?

Feeling extra dumb today so i hope someone can help spell this out for me.

I went through this document and it's still unclear to me how to save an image to the database from an API call coming from Draftbit, and then get the URL of the saved image to use in a function.

I also don't understand what's arriving in the file resource image input, and what's the difference and use between all these options:
[Image]
What would be the step by step to save an image and get the URL?

Thanks