Thank you so much Harry and Maria
Kevin, thank you so much for your advice and for pointing out the areas where I should re-look at. Really appreciate that. Yes, I too felt something is not right with Jayden's face/head. The only way I know how to 'lessen' the oddness is by lengthening his chin. I don't dare to touch the other parts...as I'm afraid the more i try to rectify, the more damage will be done. I really should be more careful during the drawing/sketching stage.
I'm not too sure how to 'soften' the edges of the hair near the face but I tried. Do share how I should do it.
The lighting is a bit different in this picture, but I've not touched anywhere else except for the chin and the hair near Jayden's nose: