Third drawing made on Paint

First off, the hair shading is not accurate. In fact, the entire body shading is odd. I can't tell where the light source is. Always try to imagine a light source when shading. Is it to the character's right? To their left? Is the light directly in front of the character? You don't need to draw a light source, just imagine one to keep your shading accurate.
As for the hair, I can see where you were going with this shading. You were trying to make a shine, but not a white one, which is natural in everyone's hair. Before making shines, do the basic shading so that the hair doesn't look like block coloring (block coloring is when you have only one shade of a color in an area. In other words, it means that an area is lacking shading) compared to the rest of the body, which is clearly shaded. Once you have the basic shading done, you can, if you want, put a shine in the hair. A shine can be a straight line, an uneven line, or any shape that fits the drawing. Your shine looks like it was aimed to be uneven, and you clearly used a thick brush tool. I would not recommend a thick brush tool for uneven shines, because uneven shines somewhat resembles individual pieces or strands or hair, so make sure to use a thinner brush for that.

The eyes are good, but not good eyes to use for a head that is facing forwards. That hook thingy on the outside edge should not be on these eyes, since the hook is more designed for a head at a 3/4 view or sideways view, if you want. I'm not saying your eyes are bad, they're actually great for your level. They just don't fit the direction the head is facing in this specific drawing.

The head of this girl appears to be in the shape of a Fantagian's head, if I'm correct. One rule for art, especially for somebody who draws in many different styles, is to never let the head shape or size change the natural pose, or the drawing will appear awkward (there could be an exception to this rule, but I'm not sure). You saw the head size, and altered the natural position that the hands should be in in this pose. They should be brought together, so they touch below the middle of the lips. I drew arrows to remind you to bring the hands together.
If you are unsure how hands might appear in a certain pose, do that pose your self (or with a pose-able doll/figurine) and observe how the pose looks on you. Trust me, I was once drawing somebody throwing an object while I was in school, and my classmates thought I was a bit crazy when I tried out the pose, but it really helped on the drawing. A lot of art is about observing how something might come together with another object, or how something might appear on top of another object.

The arms are a good length, just make sure to show that they are bent. Add some extra lines to show a bent arm, otherwise the arms will look like spaghetti noodles.

The body shape is kid of wide. Unless you want the jacket to look really big, make her slimmer. When you do that, it also gives her a more defined figure, and makes the chest look way better, trust me. On her right side, I also red-lined the shorts to just straighten it a bit, since it sort of curves in, and I don't understand that. If you want the shorts to curve in like that, ignore my red-line there. Just keep in mind that most short/pant pockets don't actually curve like that at the top.

As most people have already pointed out, her left leg (which is on our right side) looks too long. It really isn't. I measured it with my finger (yes, finger measuring helps me to get proportions right), and saw that it's pretty much the exact same length as the other leg. The only thing that makes it look longer is the fact that the knee is too high. Just bring the knee down a bit, and get rid of some extra length on the leg. My red-line there wasn't accurate, but it was just to give you the right idea.

One thing I didn't red-line is the neck. No, it isn't too long or too skinny. It just seems to be that way because the shoulders a bit too low. Bring them up a tad, and it will look fine. Remember that parts of your body counterbalance other parts, so a small neck and low shoulders (which don't counterbalance) will make the neck look long, skinny, etc.

Earlier, I mentioned basic shading. I'll tell you the rules so you understand it. There is always shading underneath an object, in between two objects that are close to each other, and in the opposite direction of or on something that is far from the light source (if the light source is going in the direction that you are viewing the drawing/art, there is no need to worry about having shading in the opposite direction of the light source, since that would be in the back). These rules are very crucial to coloring and/or shading, because they give and object depth, and they can make a drawing appear 3D. Try your best to always remember this.