Forrest,
Once you have added your image to Open Graph, you need to re-publish your website. If you have been successful, you will see the meta 'og' tags in your source code; they should look something like this - there is no need to ftp the image to your server.
Thereafter, you need to head over to Facebook debug, add your full URL
https://......... and 'scrape' to see the image in situ.
You may get a message that the FB id is missing - this is irrelevant, but if you have a FB developer id you can manually add the meta tag to the website HTML(head): <meta property="fb:app_id" content="xxxxxxxxxxxxxxx" /> content is your FD developer ID.
Gary
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