I think it is good that you are trying to make a character as that can often be a good way to be creative. I think it would be good to have references to other people’s characters and realize as much as you can about the techniques people use to make pixel art look nice.
Here is a smoothed-out silhouette of your character I created so we can see what it looks like without the color and lines. I think something is lost between the silhouette and the colors. One of the things I would suggest is to try and bring back some of the smoothness and also try looking at your character without saturation because then you can see how bright everything is, instead of having such bright colors a palette with nice changes in brightness would help the contrast:
Two of the videos I would recommend for future reference on character design are from AdamCYounis and Saultoons.
