Robe has been selected and changed to blue with color tools, then 'nun' is chopped and placed on a new canvas. Hands are brushed in and a dove drawn with brush tool.
Background has been added ( Just portion of the source is used). More detail added to bird, foot of nun color changed, shadow added under nun with burn tool.
Birds have been chopped and placed into scene, and star layer placed over entire image, reduced in opacity to leave star shapes, and center over nun and birds is erased with soft eraser tool.