good concept by not a very good execution.
1)Can denoise the stock after resizing.
2)Blend the edges with the background.
3)Find background which is able to contrast her beauty. (colour etc.)
3)Use larger font.
4)Can use some glass affect or frames.
Since shes facing right, i recommend you make a rectangular banner with her on the right so you can scribble something in the center.
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