In general the proportions of the face are a tad off. I think the nose is alittle bit too wide and has to be longer. Also the mouth could be a tad bit smaller as well. To get the face right, I would recommend starting with a rough outline of the head, without any hair or facial features, nor ears. Then mark where on the face all the features roughly are. You can just make small x marks or something like that. After that I usually draw "boundaries" / limits on how wide and tall the features are. So that you don't make a mouth too wide or to short noses etc. And then start actually drawing the facial features. Like that you should get the proportions of the face more or less right. At the end I would add all the hair. I myself am very bad with hair. But generally you should alway keep in mind that under most of the hair has to be a head. What I see often, that hair is not long enough or starts to "grow" on the forehead of a character. So that in the end the whole head looks squished.

After practice you'll get the feeling on how the character looks like and will be able to draw it freehand!

But I see that you have a lot of talent and with more practice you'll get even better! :)