My original Anime character

Hello! Great job with this portrait, and well done with the technique! The only thing I would adjust slightly is the shape of the shadows. If the light is coming from the right at roughly a 3/4 angle, we'll get the classic lighting setup where the shadow creates a light shape on the cheek. Part of the eyelid and the neck will also catch some light, which helps create a better sense of volume. Remember that different tools can help you achieve more convincing light and shadow shapes, such as the Asaro Head. By understanding the planes of the head, you'll be able to create more believable shading. Thanks for sharing your work!

I am not an expert on drawing but I can share what I can recognize. First of all, the overall impression is very nice and believable. I would suggest comparing the head to facial proportions to check yourself when you draw. They are easily available online. The eyes are a tad large, unless it's by design. I'd make an effort to shade around them to emphasize the eye sockets, especially the eye on the left so they eyes sink more into the skull. Add the nose flap and nostril. The ears are a bit high. They are typically from brow level to the base of the nose. You could define the lips a bit more and shade under the lower lip to bring the lip more forward. The lips protrude outwards from the face. The neck and shoulders are the most uncertain. There is a long beautiful muscle that goes from behind the ear to the center of the chest creating a nice dimple there it is missing. The shoulders should be wider and the one on the right drops too steeply. The shirt and sweater are nice. I like the collar curves. Draw them over the fixed torso and they'll be just fine.