On the whole it's a nice image and a good attempt if you're still learning.
My comments & opinions (not criticism, who am I to say if your work is correct or not):
• The right hand looks slightly over-worked and is developing a posterized/colour burn feel to it that isn't consistent with the rest of the image and also has a bit of a halo going on (a fine line of light pixels where the images has been separated from the background without enough feathering) across the palm.
• The pink gradient/orb across the knee and the one just above it over the light trials are slightly too solid. (perhaps play with your blending modes to allow some more black through).
• It would probably benefit the composition to see the foreground and background elements interacting with each other (I think this is what you've tried to achieve with the pink orbs). Perhaps weaving the figure through the light trails would reduce the feeling of 2 images layered over each other?