I think its good as a study, but as an artwork its hard to tell what you are getting at.
You have obviously put a lot of effort in and it shows, but she does not look like she is being hanged.
To be honest your concept sounds very difficult to pull off, especially with the canvas so limited to here face.
I think zooming rrright out to show the whole body hanging with feet pointing down would convey it much better.
and probably don't put so much effort into the initial draft.
Then u can always do a comic book style inset frame of a close up of the face if u really want that.
Even if the zoomed out frame remains a silhouette just to give the impression, it would contrast nicely with the close up, but u would obviously need much stronger light and shade...
Whichever way u go, I'm no expert but I definitely think u should start with simple blocks of colour, light and dark only, until u are happy with the whole composition, form etc.
Then start to detail and add shades of colour as u go.
I think most would agree that tracing over is not really art unless u do something really special to it, and I don't think its going to help u learn much that way either.