>>1747914Bunch of inconsistencies throughout the hair. You also switched between rounded and sharp edged hair points, instead of picking one or the other. You are also missing the highlight in the hair. The clothes and dress also have inconsistencies, and many bumps, especially around the collar area. You need to remove the extra nodes and play with the handles at the endpoints. You also want all nodes to be parallel in placement and handles in order to reduce inconsistencies.
The color choices are also pretty poor, especially the shadows on the face and clothes. They are not nearly dark enough to have as much emphasis as they should. You also reduced the opacity on the clothes, making the image see-through.
Honestly, I wouldn't even try to fix this image up. The original is very poor on its own and there isn't too much to gain from this since the lineart is very thick and simple. You would be best to move onto a more normal image, such as a anime screenshot or some simple fanart, now that you have the basics down.