I can tell you that it doesn't matter if you don't paint your head like a model, because when I was studying at that time, almost no one painted like me. I was fine myself, but I painted it for a long time and the teacher didn't like it.

Therefore, it doesn't matter if you don't look like it, as long as you don't follow the routine and know whether you are drawing a man or a woman. In addition, you should draw the five senses accurately, such as high nose and glasses. You should draw them well and see the three-dimensional sense, but the three-dimensional sense should not be too strong. So is the mouth. Don't draw too hard. When drawing ears, blur them properly. Otherwise, if you draw too hard, they will stand out and your cheekbones will be drawn accurately. You can draw your hair into different faces, and the hair at the back is blurred.

In addition, look at more pictures of head muscles. Sometimes the pen can follow the muscles and accurately grasp the muscles, in fact, the face will be enriched. But if you draw women, try to be gentle. If you depict women, try to focus on glasses, lips and nose.

Finally, every time you draw a good picture, you should ask the teacher to see what you lack. If you know what you lack, copy more and use more. Anyway, ask the teacher for advice at the first opportunity, and it will get better over time.

So there seems to be nothing wrong with the appearance painting. Now it is mainly to copy more and invite more teachers to improve your overall head shape, three-dimensional sense and facial features, as well as the necessary blurring and differences between men and women.