Sorry for the late reply bro bro.
I like it a lot, but if you want to use a decent size so you have space to work with yet nice without toooo much space. You should use the size I use. 400x250
Now onto actual C&C. I notice that you have the C4D in front of your image. You need to use a soft eraser, a clipping brush, or make a copy and lower the opacity to make it blend into her.
Now I also notice that your background is really plain Jane. You should try make placing your C4D again, rotating it behind her with the flow of the ones in the front and go from there. If you blur the background layer of C4D it would also draw to your focal point.
Overall, I like the color, I like the flow. No to Blending, no to background, no to depth.
Pleaseeeee fix these things and post your new piece with this advice. I would love to see it.