I am trying to post photos inline with my text, rather than as a link, but am having problems. I tried posting the ones I had stored on my computer directly but the files were much too big for me to post and I don't understand how to compress them (I have a Google Chromebook)
Alternatively, I tried posting them from my cloud storage site, which is Google Photos. Posting a link seems to work ok for me, but not photos inline. I think I understand what you mean about taking the extra letters and numbers at the end of the link to make it end in (for eg) ".jpg" so that our website recognizes it as a photo, but my Google Photo links don't have that sort of ending, no "dot anything"
For eg: https://goo.gl/photos/qsXDaQwkAECTu6KW7
I tried bracketing it with [img] and [/img] but that didn't make any difference