Needs a lot more to be desired
I guess I should write a critique about this drawing. But first I'd like to point out that this is in no way realism or semi-realism, it's 100% anime. I mean look at it. Well with that made clear let's proceed with the criticism.
I think your biggest weakness here os the shading. The main reason as to why your shading seem to be quite ineffective is due to the softness and uncertainty of your strokes. I advise you to use more solid and pronounced shading in order to make a larger impact on the viewer. The shading is rather dull and boring. Adding a wider range of darker shades a lighter ones might make the it more interesting to the eye of the viewer.
I'd also suggest to use some highlights since it generally helps make the drawing look a lot more realistic. Also what's up with her eyes? Are they glowing? Well they don't look pretty useful in the picture. It's bit of deadweight around the other elements of the drawing since they are quite unnecessary.
The shading around her hair looks very messy, there is no order at all. I think it's another factor that pretty much downgrades the picture. Also the background looks very unappealing. Also her neck looks too long.
Generally this pic really needs a lot more. Better get to practicing then. 3/10