just keep woerking.. try new stuff, look at others works and take inspiration out of it... try to understand the techiques behignd that shit and get better.
also... look at some tutorial for make anime eyes and imo.,. you should lower that mouth and the back hairline

I like it.
Nice hair style and nice headphones.
Keep practicing and you'll get better and better.

New Version Added,
Lowered the mouth, and made the hair on the back lower.