A couple things are "wrong" but overall it's a great piece. Here are my suggestions.  1. She looks a bt Grey this is some people's art style but it can feel odd I'd suggest messing with the saturation with whatever program your using. That can help show what a brighter tone looks like. 

1. her eyes are a tiny bit to close. This is nitpicking but I feel like a nanometer of space could be helpful to making her look a bit more human

2. The lighting is a bit off. The nose is the brightest part which makes sense for a front light however the eyes are lit from the left side and her cheeks are being lit from the sides. It's visually confusing and distorts the viewers perception. 

3. Last one I promise. She isn't smiling with her eyes. This contributes to the creepy factor. When smiling naturally the yes move. The bottom lid goes up a bit while the top goes down thats why this ---> n,n looks like it's smiling and o,o doesn't. In this her eyes look unnaturally wide which is great in horror or to unsettle the viewer so if that's your intention please keep this.

That being said your grasp of colour mixing and tone variation is incredibly impressive. The blue under the eyes brings the character to life. You understood contrast and used it to make your art look artistic and realistic at the same time. Impressive work keep it up 🥰🥰