>>1913439>>1913443Couple things. You need to use less nodes for the longer pieces of hair. Only place nodes at the beginning and at the tips, and then adjust the handles so they fulfill their given area. Do not overextend handles, especially at tips, as you flatten the area and lose curvature. It is very important that you keep the tips of hair curved so that the hair does not appear blotchy or flat. Keep the curvature, and then place nodes in between to fulfill the areas that the handles could not achieve.
It is also much smarter to keep certain shapes as separate objects, especially if two different strands of hair cross each other. If you try to draw them as one shape, you will create very awkward shapes that look lumpy and inconsistent where the two pieces cross. Instead, draw them as separate shapes so that they cross properly. You can unite them later at the end, or select all the shapes and make them a compound path to keep them separate, but apply a color or gradient across it as one object.
For the skirt lines, you need to keep the thickness between the shapes much closer together. Even though it is fairly messy in the original, that messy style becomes much more apparent in a vector format. Keep the thickness and the curvature of the shapes consistent so they flow as best as possible. You also have some clipping issues. Make sure that you have the fills cross each other so that you don't see the coloring underneath in between. There are also a couple areas where those fills do not go to the edge of the skirt, or go past it. If you're using Illustrator, then go to the tutorial in the OP and learn how to use the Shape Builder tool. It will help with that kind of situation.
Otherwise it is not too bad. Get a better handle of how to make your lineart smooth and consistent and your images will start looking better.