That is pretty close to a KSO - a Knife Shaped Object. Lots of first knives are that way, so you are in a big group. How do you improve that? Start by reading up on how to make a knife, and then look at lots of knife building tutorials and WIPs. There are many on this forum.
Some areas to work on;
The blade shape isn't user friendly. A simple drop point hunter would be a good choice for your next knife.
The finish is not there at all. You just ground away some metal and called it a day. You should file the bevels in fully, sand it smooth, and finish things crisply.
Fit...well, I think you can see how poorly the blade fits the handle. It appears you glued two pieces of wood on and roughly shaped them. Look at some photos of knives on this forum and you will see how it should be attached and shaped.
The handle is very blocky and uncomfortable looking, again, look at some WIP builds by other new makers and see how a handle should be shaped.
You didn't say what kind of steel it is, but from the looks and your description, you just took a piece of steel and shaped it into a sorta-knife. To make a knife you have to use a steel that can be hardened ( most stainless won't harden), and it has to be heat treated to harden it after the preliminary shaping and sanding are done. After HT it is sanded and finished the rest of the way.
Keep at and make another using a little more time and planning. Posting a thread with sketches and you build plan is a good way to get input before you start, and guidance as you build the knife.
Take a look at this first knife build:
http://www.bladeforums.com/forums/showthread.php/1087024-First-knife-done!