Hiya! Great attempt! I think I would simplify your shadows even further. If you squint, the difference in value between the eyes mouth underside of the nose and side of the face aren't all that dissimilar. Try and group all those values together into 'shadow' and don't focus so much on the details (eg the pupils and nostrils - they don't stick out to me in the image as they do in your value study). Pretty accurate face shapes and structure though! Keep it up!

@Saurbh Chaudhary try crosshatching technique + use 2b-4b for skin texture, mechpensil/hb for contours + smudge the pensil strokes with your finger to make a skin tone + adjust the values (left supposed to be the darkest side, right the brightest) + never leave unfilled part of portrait just because that's where the light strikes (the values must be defined even for the highligts) + start academically (just as proko taught, with sharp lines/geometrical objects and/or go through the loomis's drawing the head and hands book).

Nice line structure I think your values and forms are not enough that’s why it looks flat , shadows are meant to be dark . Try to start to much more easy subject like sphere, egg ,box to practice values portraiture is too complicated for values, forms ,shapes etc. .✌️

Your line work looks good but I think you need a greater range of values, There are some parts here where you should have gone much darker, but are keeping to middle values, which is fairly common when starting out. I went to a gallery showing of Alex Ross's comic book art and his high school work had the same issue, so it can happen to anyone. Ross also had some of his college projects and there seemed to be one in particular that seemed to solve the problem. He did portraits on black media and worked from dark to light instead of light to dark. It's the method he ended up using on his first comic book project as well. Obviously, Alex Ross has long since solved the value problems in his earlier work, so it might be worth giving it a try. James Gurney also did a post on this and suggested a cure. The exercise he suggest here is one of my favorites: http://gurneyjourney.blogspot.com/2011/04/cure-for-middle-value-mumbling.html

really nice work! love how you group the shadow shapes ! the face structure is also clear here, what i think u can do to improve it is be braver to add darker values to some parts of ur drawing like the eyelids and the shadows in her cheekbones! you should checkout Stephen Bauman's courses or videos since he does and teaches some great portrait another thing i noticed is that the hair lacked structure i think u can learn a lot from this vid too How to Draw Hair - YouTube by proko hope this helps!