Mathew, good first effort. Now go catch a fish with it!
The plus points on the fly are.....
You managed to get the dubbing on the thread.
There is a distinct abdomen and thorax area.
The thorax cover is spot on.
The points which need a little work are...
Proportions, the thorax is too long and a little bulky.
The abdomen is a little short and a little bulky.
The eye is crowded.
How to fix the minor points.
As a rule of thumb the proportion should be roughly 3/5th abdomen and 2/5th thorax.
Use a lot less dubbing and tear it in your fingers before applying it to the thread, this will make it more manageable and will give it a better, "buggier" appearance.
The golden rule in dubbing is "little and often" it is easier to add dubbing than it is to remove it. You will be surprised at how little you will need.
Try taking a tiny pinch of dubbing, what you think will be about 1/10th of what you need. Then tear it with your fingers and apply it to the thread. When you apply it make sure you spread it thinly, then wrap and see the difference.
On the fly shown you have started the body roughly halfway between the barb and the point, try taking another two or three turns of thread so that the body starts opposite the barb.
When tying the thorax remember that you need to leave enough room to finish the fly. With experience this can be as little as one or two turns of thread, but to start with you might find it easier to leave enough room for four or five turns of thread.
If you have applied too much dubbing at the thorax, don't be tempted to wind it on anyway to use it up. Instead pinch any excess off.
As I said these are minor points and quite easily fixed, so don't look at this fly as inferior or a failure, look at it as the first of many successful steps on the road to fly tying nirvana.
If you haven't already looked, take a look at the post I did on dubbing techniques in the step by step section.
If you haven't already done it, send a pm to Tango51 and politely request a copy of the flytying DVD I sent him, there are a few clips on dubbing in it.
Finally, don't forget to post regular pics of your flys so that we can see your progress and help you when necessary. That is, until you get to the stage where we come to you for advice.