Can this picture be considered as decent?

I went to a football training last night and I tried my best to shoot the best I can using my Nikon D5100 and kit lens (18-55mm) combo.

The colour of the picture was edited. Also, the original picture was much bigger and you can't barely see the face of the players. This picture in the link was cropped so it was kind of like zoomed in and the players appear much bigger in size.

Also, do you know any way (converter, software or something) that allows me to zoom in the picture I took without reducing the size of the original picture (like I won't have to crop the picture)?

Not bad at all.

Its very nice

I like it but i think it couldve been better. It doesn't really look like much action is going on right there except for the guy kinda running.
Also you don't want to enlarge it because then itll lose quality.

But yeah i think its decent for that lense.

It's not really a particularly good photograph.

There doesn't seem to be much going on. The photo doesn't really have a main subject or point of focus. The hoarding at the bottom of the image is also quite distracting.

Sorry you can't use software to zoom in on an image to make it better. It's not possible. If you zoom in or try to enlarge it, the quality will get worse.