Upload & Sell: Off
Why not go out this weekend and shoot some new photos?
And repeat the same mistakes? I've taken about a dozen photos in my entire life where I wouldn't have done something different to improve it after seeing the results and reflecting upon them.
The learning curve has several tracks. One is the technical stuff like understanding the limits of the camera DR and working around that limitation to record seen-by-eye detail (when desired). Another is learning to "see the light" which really means understanding how it creates the illusion of 3D modeling in a photo and what makes it look natural and normal, or not. A third and more difficult skill to master for most is learning how to tell a story in a photo that a stranger will find interesting and will trigger an emotional reaction. Because notwithstanding all the other things if the photo doesn't trigger some reaction what's the point of taking it and sharing it.
How photograhers travel up those parallel tracks of the learning curve varies depending on their temperament and training they are exposed to. Somewhere along the way one or more of them may become ruts they get stuck in and need to get out of to sense progess. Posting photos and asking for C&C is a way to get out of those ruts. For that matter so is providing C&C because more often than not it's a photo I wouldn't think to take and it forces me to stop and consider that and opportunities I tend to miss when shooting.
The only problem with this shot is that it's an out of context chapter in a more interesting story that leaves the viewer disappointed. It's like giving a kid candy with a clear wrapper they can't get off. So in terms of the three tracks mentioned (there are of course many others) its a win-win-fail. Technically it's competent, the lighting reveals it's shape realistically, but there's no compelling story.
How to improve it? Difficult to offer advice without knowing the context. You've seen me mention the "cinematic" approach in C&C many times here. The reason I find it helpful in the photos I take is because it programs my brain to always thing in terms of, "What's the story here and why would anyone find it interesting?"
The problem with still photography vs. movies is that it is very difficult to tell a complex, complete stiory in a single frame. Still photos lend themself better to scenic wide shots or close-ups of single focal points. The wide shots provide context, the close-ups create stonger emotional reactions. The middle ground where you fill the frame with 50% foreground and 50% background context which is equally compelling and interesting tend to become a ping-pong match for attention. That's not the case here, this is a close-up lacking a wide shot preceeding it to provide the needed context.
So my advice for this shot would be that next time you see a detail like this that catches your eye due to it's detail and lighting shoot it just as you have here, but then walk backwards and try to find a "medium" 50%/50% composition that shows how the close-up relates to the environment. Then back up even more and compose a scenic view where the focal point of the close-up is seen but the emphaisis is on the context. Together the three shots will tell as more complete story, none as well individually as together, but that's just the nature of still photography. Force to pick one of the three it will usually be the medium shot that works best, but only if composed in a way that contrasts the focal point from the context with tone, color, sharpness, etc.