Sorry I forgot to add this reference actually the reason to choose his face was That only, he has very intresting child like and a stubborn face.

Hello @vishal singh , I would like to say that your rendering in this drawing looks pretty good to me. Good job! The thing that is jumping out to me is similar to what these other folks are saying. The proportions seem a bit off. The forehead area seems quite large and the mouth, nose, and eyes are somewhat squished. If you check out Loomis face proportions, it seems like the proportions of this face are somewhat "baby" or "childlike." Usually small children or babies have larger foreheads and craniums with smaller facial features. However, if you compare these proportions to older people, you will see that usually older individuals have larger noses and ears. If you would like to make this portrait look somewhat realistic maybe try to adjust the proportions. Hope this helps a bit. Thanks!

This is an interesting drawing, the expression is very clear. Some things that I'm noticing about this drawing is the proportions of the face. It seems as though the forehead is very large and the eyes and nose are scrunched together. The eyes are a bit big and the ear is very elongated. The nose shape looks great, but the mouth has an odd shape (it looks unnatural). One more thing is the shading of the beard is a bit too blended, there is no visible texture, but the hair on top of the head is very nicely detailed! I would recommend studying the skull, landmarks of the face, and the Loomis head. All of these things are available on the Proko youtube channel, or courses if you want to draw portraits. I wish you good luck with your art aspirtions!

Do you have a reference photo to compare?