I just created a template note in obsidian that contains the full URL to the Documents folder on my Mac. Something like “file:///users//Documents/”.
As I do know the structure of the Documents folder very well I can link easily to a local file by adding the template I created above (CMD-ALT-T hotkey in my configuration) and then add the folders and files I want after it.
To have autocomplete would be extremely cool but I expect it not to happen on a short notice.
Regards,
Jeroen