Hello, to show the image, you need to place it at Feature Image, check out the attachment 🙂
About the click to continue and nothing appears is because you changed the post permalink to blog which makes it redirect you to the same page, you need to change it or leave it by default but right now its broken, i created a clone of the post for you with default post permalink and its working fine. Just remember to not edit post permalink 🙂
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