I think you did a great job with that fly. Keep that guy tucked away as a keepsake for your venture into fly tying. Years from now, you will be really happy you did because you'll have something to compare your progress to.
I struggled with whip finishing flies and did the half hitch thing for quite a while, until I got into tying smaller more intricate dry flies. I knew I needed to learn, so....
I found a video on youtube that showed me what to do. Not sure if this is the same one or not, but it should help you tremendously. Get a streamer hook or one with a long shank and just practice using the whip finisher. Don't tie in any materials, just whip finish. Once you get the hang of it, you will be happy you learned how to use it.
[ame]http://youtu.be/i8PwX71zzkM[/ame]
By the way, keep posting flies here, we have a super group of tiers who will be glad to give you some tips and advise if you are looking for that sort of thing. Keep an open mind, while you may get some criticisms, folks are genuinely trying to help.
What I found with flies I first started with is that a good number of them worked quite well despite how they may have looked. I've no doubt that SJ Worm will get you on the fish.
