Not too bad for the first! The fish won't care about the looks, so it will catch some fish. A few suggestions. The hook looks a bit small for the fly. Perhaps a size or 2 larger for the same size fly would work better. Proportions on flies, particularly on streamers, are more important than actual appearance, because the proportions are what give the fly balance.
Looks like you're using neck hackles. Try to match the hackles so that the tips are all even. Again, the fish don't care, but with thinly webbed hackle, you'll get a better profile when they're all matched. The next thing would be to use hackles that are more webby. I prefer to use strung neck hackle for Deceivers, and those with plenty of web provide the best "density". Unfortunately, what is in a package of hackle will not always be all the best, so mixing them, thinner & webbier together will usually give the best results & still allow the use of most in a pack. If you use strung saddle hackles, that might have more web to them & lots of "fluff", that will add additional substance & the matching is less of an issue. I use them when I want a thinner profile.
What you used will work fine. These are just things I've learned that make better use of the hackle you have.
The blue bucktail you used looks a bit too stiff for the fly. May just be the picture. Although it's not always easy to do, try to use finer textured hair, which will often be the hair closet to the tip end of a bucktail. The base hair is certainly usable, but it's often better for bigger flies. I save the base hair when tying flies to be used on big saltwater jigs, because it does flare more & is often longer. I tie jigs up to about 8 oz in weight.
So the smaller the fly size, the finer the hair. Personally, I prefer to select tails that have finer hair anyway for flies as the finer hair will flare less when tying & have more action in the water.
The head on your fly only needs a bit of refinement, which will come with more experience. Proportion wise you did a good job.
Hope this helps!