How to get your sharing URL
Step 1: Go to Google Drive and right click the file that you want to share.
Now click on "Share...".
Step 2: On the window that comes up, click "Get shareable link".
Step 3: Make sure the dropdown is set to one of the "Anyone with the link..."
or "Anyone on the internet..." options, then click "Copy link".
Step 4: Now just paste that link into the text box above and create your direct link. Enjoy!