Nothing can read your mind for #5 (especially the "Edit" part) and #6 (find the (right directory).
I have a similar problem (well, I had, before the pandemic) with my receipts for my work expenses. My workflow is to:
	
	
	
I have a similar problem (well, I had, before the pandemic) with my receipts for my work expenses. My workflow is to:
- scan the things outside of Gimp. The scanner unimaginatively gives the images sequence numbers
 - I use my image browser to reorganize things: split to folders, or rename the file to the actual date (this is also a sequential number)
 - Start Gimp to edit them sequentially (mostly crop, occasionally rotate). What makes me save a huge amount of time, is a Gimp script that
- Saves the current image
 - Finds the next image in sequence (the script allows "gaps" in the sequence)   in the same directory and opens it
 
 - Saves the current image
 - The rest is mostly learning all the necessary keyboard shortcuts (and add one for the file-next script)
 

