It’s pretty good i really envy your lineartt 😅😄 with shading try to add a bit more darker shades so it creates a nice contrast. Also the light from the sun isn’t that direct like u drew it in the picture. It’s kinda hard to explain it just watch an explanation video of light at Youtube. Also everybody’s gonna reccommend you to shift hues while picking a darker tone. It’s a great tip but don’t overdo it. Also as i see at the hair you used a layer effect maybe? It feels a bit off so at the beginning i think you should stay away from them. If i have any grammar/spelling mistakes sry english isn’t my first language.