Hey lilly, it's a good overall piece ! I really like the ambiance and it really has potential. so, talking on what you should improve: - first of all and maybe the most important : the famous anatomy ! Main issues here = head/spine, arm/hand and one arm missing Be careful on the skull not following the spine movement. It's a common error i did for years lol. Learn how to decompose body parts in simple shape to place them in perspective easily. since your character head/upperbody is going further, make the arm and hand under the face doing so, and find on testing on yourself what makes it more natural. Second main error on this part is the missing arm, the girl shall be able to stand on it, nor she won't stay on this posture ! And so the hair won't seems to be in front of the missing arm that seems weird. Second, i might say values. shift your illustration in black n white, and compare on master's studies or illustration you find pretty good ( black n white too). compare the value range and try to apply what seems to work on other's stuff. Like, playing with values for focus point, or give details on what is close to us/ far etc. My takes is way darker so it may not fit the atmosphere you're looking for, but it's an exemple :) Hope it helps !