How are your drawing abilities? Because what I see in that image is that everything was hand-drawn or even done with traditional media and/or airbrush (edit: after more examining, I am fairly sure this is a traditional airbrushed piece with painted details on paper).
I believe that is the cover for the album from Bathory – Blood On Ice. (1996 - the image might be earlier, though.)
So, YES, it is possible to create a similar painting in Photoshop. IF you have good drawing/digital painting skills. It can be done in any digital painting application with good painting tools.
Now, if your question is whether that course will teach you how to do this? If your drawing skills are lacking/undeveloped, than the answer is a resounded "NO". The best that course can do in that case is to teach you how to composite photos and other images in Photoshop and how the painting tools work. But that course will not be able to teach you how to draw and design like this in a mere 25 hours.
To become this good at painting takes at least one or two years. Probably more for most people.