Below is my standard reply to beginner artists who are posting work that really don’t benefit much from critiques:
It’s really hard to critique works from artists who are still very early in their artistic development, just like how it’s very hard to critique someone’s language skills if they are just starting to learn a new language, because so much of what they do is wrong. To critique beginner’s work would no longer be critique–it would become instruction in all the basics, because you would have to explain every aspect of the visual art foundation in detail and how they related to the mistakes made in the image–from composition, perspective, values, lighting, tonal composition, atmospheric perspective, color temperature, color contrast, radiosity/color bleed, deceptive colors, contextural color illusions, anatomy, figure, psychological and physiological roots of body language and facial expressions, aesthetic sensibility, hierarchy of edges, brushwork, line quality, visual storytelling techniques, and so on.
My suggestion is for you to focus on learning the critical foundations of visual art–don’t rush into trying to construct your own images because you lack the necessarily knowledge/skill/experience to do your ideas any justice at this point. Head on over to the Art Techniques & Theories forum (linked below in my signature) and start reading the sticky threads–they will help you far more than any critique you’re going to get at this point, because any critique you get would essentially be very condensed and simplified art instruction anyway, and they won’t help you that much if you aren’t learning those instructions in proper context through a carefully laid out learning/teaching plan.