The main issue I noticed right away, is how inconsistent the lighting looks. Some parts of the image show the main light source to the right, and it’s pretty directional, but in other places in your image, the lighting becomes inexplicably diffused and all the shadows that should exist are missing.
I took a look at your portfolio, and I’m noticing the same problem in your other pieces.
The problem here, is that by using all those photo elements in your work, you haven’t actually learned the foundations of visual art properly, and those photo elements become a crutch instead of a tool.
In order to use photo elements convincingly and correctly, you must understand the basic underlying principles of lighting, values, and form. Without that proper understanding, the way you mix the photo pieces will create illogical inconsistencies with contradictions and egregious mistakes.
It’s important to learn how to paint properly first, otherwise, using photos just becomes a crutch and you won’t be able to do anything without relying on piecing together photos.
You might want to read the sticky threads in the Art Techniques & Theories forum (linked below in my signature), because there are some very helpful threads and links for effective artistic development that will make a huge difference in how fast you effectively you improve as an artist.
i will post a new one to get some feedback!