HDR is an art. Basically it is the art of overcoming the limitation of you camera. What you do is very simple. You take multiple shots of the same seen with different exposure. Combine all the different exposure photos together in any image editing softwares like photoshop. Mask the under exposure and over exposure in proportion to make it a high dynamic range image.
There are plenty of tutorials available online. Go check for it. Happy HDR.
.jpg)
