So I kept looking about where to find this documents folder, and I did something that might be the solution.
When I logged in to my account online, I clicked the setting cogwheel icon on top, and clicked on "Google Drive Settings" I tried to enable it and followed the next steps. Then I tried to remotely take a picture after that, and it did show up on my google drive account online.
So I guess that's how we can find the photos we take, instead of documents folder which I think is in their servers but no way to access it, and their customer service number is no help especially for mobile users! they don't even have customer service to call for help, and I was even charged twice for 1 purchase! which I had to send a ticket request for refund.
Hope this helps other users.