1
It is not possible to add that folder shortcut to the Move To dialog, however, if you right click the new shortcut you created on your Desktop and select 'Pin to Quick Access', that should appear on the left side of File Explorer for easy access.
Then you can either drag and drop files onto the Desktop shortcut or onto the Quick Access shortcut for that folder.
2
That problem with uploading images to posts on this forum is caused by an update to the forum this week and it has been reported to the forum owners, so hopefully that will be fixed soon.