First, sketch the outline of the face lightly. Then, add features like eyes, nose, and mouth. Remember to give expressions to make the face look alive. Also, study real faces to get a better understanding of anatomy.
Start with basic shapes like ovals for the head and circles for the eyes. Pay attention to proportions and symmetry.
To draw a manga face well, practice drawing different expressions and hairstyles. Focus on the eyes as they convey a lot of emotions. And don't forget to add some shading for depth and dimension.