Test modification of your latest attempt.
Syntax used:
<div align="center">
<a href=https://i.imgur.com/vK0EuDs.jpg> <img src=https://i.imgur.com/vK0EuDs.jpg></a>
</div> 
The a href argument makes it clickable and the img src argument indicates it’s an image. The URL should match, with one exception: a space after the end of the URL followed by width=xxx where xxx is the width, will scale the image to another smaller size where necessary and most importantly keep the aspect ratio.
You can add a <br> just before the </a> to force any text entered after the <br> to show below the image if in a table.