I'm not sure how much critique you're honestly looking for here since you have your comments listed as "anything welcome", but as far as realism practice goes, I think this needs a lot of work.
The two issues that stand out to me the most are the lips and the eyes. From the way her head is turned, you wouldn't see her entire mouth; the...I don't know, the crease? Of her upper lip should be directly under the center of her nose, or about where you have the edge of her mouth right now. The mouth also looks a bit too low considering she has her head turned upward. You would also see a lot more of her jaw.
Her eyes are also far too big! One of anime's most distinguishing features are the character's unrealistically large eyes. That's also, in my opinion, one of the hardest things to break away from when trying to draw more realistic faces. The eyes would definitely need to be smaller, but I think you captured the 3-dimensional aspect of them rather well. They don't look flat; they look like a round object in her head, which is exactly what you want to be going for.
If you don't mind me asking, did you use any references when drawing this? If not, I highly suggest you do! References can be great help for things that you're struggling with. I've attached a stock photo I found just via Google Images that may be the head position you were trying to achieve here. As you can see, there are a lot of differences between the two. Studying real life is definitely the best way to learn how to draw it.
I feel like I'm being too hard on you though, and I should say that it's commendable that you're trying to practice realism. I'm sure with a little more practice, you'll have no trouble at all! I hope this helped!
The reference I used was a drawing that somebody else did. I thought it would be easier if I started with something that was pretty close to a real person but still had a hint of anime in it. This way I could slowly ween off of doing so much anime and work on other things. I don't know if i'm ever really going to get lips right though, I just think that long lips look weird on a drawing; especially an amateur one like mine.
I don't think you should wean yourself. The easiest way to learn how to draw real people is to draw real people. Let anime go entirely and immerse yourself in realism or you're never going to break bad habits. Learning the fundamentals of how the human body looks and works will be the key to help you develop your own style as you go.
And don't worry about the lips, with enough practice, you'll be fine.