1. I think you either smudged the background or just got like a really plain background, it's simple and good, but it needs more detail.
2. NEVER put your font in the corner. Do you know the rule of thirds? It would take hours to explain, so you can learn about the rule of thirds
here.
3. The border is too thick, and you shouldn't have a border in the first place. Taking the border off would make it look better.
4. Render placement is nice.
5. You should add some nice gradient-maps in there, because the colour scheme is awkward and plain as of now.
6. Lighting is well done. Notice how your light is coming from the right, and then look at your render. Your render has light coming on its right. Well done!
7. On the left side of the render, on the arm, there's an awkward cut there.
Overall - 7/10