Well, I'm not a professional so maybe ask one of the others :)
But very quickly, I would say that you just need to think a bit about the compositions, look into the Rule of Thirds, think about how lines interact with other lines as well. Also a little editing because they are just a bit flat.
Here's what I would do, very quickly..
YOURS:
MY EDIT:
wow !!! after editing .... focus on dragon fly is now showing perfect. And every details of main object of photo looks great. How you did it ? Photoshop or other special software you used ? And thank you for your tips :)
Photoshop...
Crop, tones, brightness, contrast, curves, slight sharpness on subject, slight desaturate (sponge tool) on the background.