>>1724629>>1724654Get in the habit of connecting a lot of your lineart. Do not make two separate lines and just have them meet or cross at the tips for the hair. Draw one "V" shape, and then adjust the nodes and handles for thickness. Pay attention to the distance between the two nodes at the V tips when creating a thickness too.
For the eyes, use the Circle tool to create the outer lines instead of attempting to draw them. For the upper part of the eyes, keep them consistent. You have her right eye considerably thicker than her left. Make both sides similar. The same goes for the bottom under-eye part. Keep the thickness and the shape consistent between the two.
When drawing lines going into/under other lines, like where the face line meets the hair line, make sure you have it end with two nodes, like a curved rectangular fill instead of a triangle fill. This will help with thickness. The same applies to the fuzzy cotton lines. It is harder to see what the lines should be, but come up with something that can stay consistent between separate shapes, instead of having weird incredibly thin points that then go incredibly thick right after.
With the coloring, just be less harsh with the gradients. Spread the colors between the radial/linear gradients so the transition is smoother.
Here is a roughly what the image should look like.
This image is very difficult for you (even for me) though, so I suggest you practice on simpler anime screenshots for awhile.