aye bruh, u should work on ur anatomy, the arms are too thin, the legs are too thin, the torso is too long, and her spine is doing back flips, and give her some forehead space.
tone down the brightness, and dont use white for highlighting everything, u can just use lighter shades of different colors.
use different colors for the lineart to match its colors.
love the concept, the pose, and the ammount of details uve added, especially in the clothes.
anyways, i think u can do it, keep up the gr8 work, i believe in u,
good luck!!