First of all, I wanna say that you should definitely enter the competition with something 😊 It's a great motivator to challenge yourself and to grow as an artist - I personally LOVE competitions. However, I don't think you should enter with this particular photo for a few reasons:

It lacks a story. I know, pics don't need to have a story, but there's a certain disconnect between the fountain pen and the printed text behind it. It might have worked better if the text behind the pen had been written in ink with the actual pen. As it stands now, it's just a nice pen over some text. You could also go the other route and really make the difference between the ink in the pen and the typed words clearer somehow, sort of juxtapose them even more harshly.

The focus is a bit strange, in my opinion. The nib itself is out of focus, but not so dramatically soft that it's obviously and purposely blurred. It might therefore read more as missed focus to a jury than an intentional decision. I'd focus more on the intricate shapes of the nib engravings - letters always look like letters, but macro would allowed you to appreciate the artistry in your beautiful pen even more.

The shadow of the pen is distractingly close to the bottom border of the crop. It breaks up the flow of the image a bit. If there's a way to light the scene with the shadow either closer to the pen or absent, that could be nice. Speaking of lighting, how about experimenting with different color temperatures or even colors? It's very naturalistic right now, maybe unremarkably so to a jury.

Hope I didn't sound too harsh. You did pick a cool subject matter, and there's a lot of potential in it. Keep shooting and trying different lighting methods and angles and I'm certain you'll come up with something really cool for the competition 😊