HI Greencat, BTW, welcome aboard!
That one doesn't work because it's not an actual image file.
The insert image function tells you: "Allowed Filetypes: jpg, jpeg, png, gif"
If it's not one of those types it won't display.
THe address you used looks like this, doesn't have one of those extensions:
https://drive.google.com/open?id=0ByTEauv1ZJnaX1BtOTFkRC1oQnc
Just clicking on the link will take you to the Google page and image can be viewed from there.
I can see the image file name but it won't display without more info telling your browser where to find it, and Google's not helping:
Got a suspicion it's in somebody's private Google account folder and that's why the whole image file address can't be accessed directly to show here, but that's the limit of my own Google literacy at the moment.
Looks great from here!