Reminds me of Klimt, but doesn't directly reference him. Nice composition, I like the treatment, looks like you may have scratched away some paint or stamped? To get the diamonds and other little shapes. All in all, I'd say this was amazing first attempt at acrylics.
I didn't scratch away anything I just dabbed golden acrylic paint all over the page and black acrylic paint atop and then used gel pens and some crayons. So in fact these little shapes are drawn by the golden gel pen