Problems with Images

I'm trying to use images from my google drive, but I get broken link icons in my timelime. What am I doing wrong? I was able to get one image to show by getting a shareable link from my google drive and pasting the link into the media cell in the spreadsheet. But it took several attempts and I don't understand what I did differently with my other attempts with other images. Can you provide clear directions for how this is supposed to work?