After I download this image to photoshop, I do not want to separate its elements. I just want to prepare it to be printed. Does the whole image 11x14 at 300dpi need  to have an invisable background? How?
Does the whole painting have to be made transparent? Does it have to rasterized? I do not know how to send it to be printed like any other work we do becuase I am not moving elements around and placing it on background. 

Also, that leads me to another question. How do I prepare a water color sky as a background for my composition on photoshop in which I will move elements onto it. How do you make the background to be invisible if it is necessary step after all. I know we clean and make all the elements have an invisable background but how do you do this with background itself? 

Yikes, I am sorry for such a long question. I don’t know if I am making myself clear. 
I really appreciate your time. 

Thank You, 

Mona Lisa