YEah, for a beginer your good. The outlines are a bit wierd, but I'd say thats just from your image hoster (It happens to me all the time)
As for the mixes, Maybe try overshading the recolord dragonair a bit, to give it more depth, and for the mixed dragonair, try fusing the hair a bit better ti the boddy, abd not having the tail in a completly black outline. But otherwise, there great!