Just a heads up, images don't appear for me on the thumbnails. Looks like you have them in the post body instead of the main/URL spot. The body supports multiple images, so my app (and I suspect many others) don't use body images as thumbnails.
We are all happy to show you the ropes because that makes the site a better place. Plus, it's always better to see new communities get the help they need. 🙂