I agree with Spruce of course.
As for fixing up an image to resemble this . . . you might try a few effects. I haven't got PS available at the moment or I'd give it a try.
I would make the layer a smart object. Then I would use a gaussian blur on it. Then you can use the blur mask of the smart object to selectively reduce or remove the blur as you would like.
I would use the smudge or liquify tool to soften and mix the colors in some places. Here and there you can add noise for the stippled effects.
You'll probably have make selections in many areas so that you can add special effects just to that spot. For instance, some of the noise is in BG only and not on the objects. You may want to alter hue and saturation to your photo image or use photo filters to give a subtle (or not so subtle) toning to the overall image or a selection.
You may want to create a BG and use a texture overlay and a colorful gradient to get an effect such as the card with the books. You can also add a texture, add a layer mask, then a gradient to alter the effect of the texture. Things like that.
That is just for starters. The only limits are your imagination and experimentation with color, filters, blend modes, opacities, etc. To do something like this truly demands that you know your way around Photoshop and have tried out many methods to create the effects. No matter how long you've been using PS (OK, I take that back for some of you guys/gals), tutorials can often suggest a hint or method that you might not have ever considered.
Anyway, if you want to post an image you have in mind for treating in the above manner, it might be fun for us to give a shot. I might have time when I get Photoshop up.