I really love the use of the Textures and the overall scene. I noticed that the background seems somewhat static. You can fix this by bringing the character closer to the camera and using some depth of field to bring certain areas of the scene into focus, while making others out of focus.
Hello! This piece of art that you have shown is stunning, I love the time you have taken to just add the lighting effect to the hat, it’s remarkable. Although I do not have any recommendations as this is beyond my skill, I would like to mention just to keep up the good work!
It look really good!
If you are using blender, I would shade smooth the meshes I screenshotted below.
They just look unrealistic without that.
But you did a really good job on the other stuff, I love it.