Please, consider this as an intent to help you:
There are too many elements on the picture (guitar, coat), and we can't see very well what you may have wanted to show. It is too artistic-style to be porn and too direct to be art. There are many "Nude Photography Tips" on internet...
https://duckduckgo.com/?q=Nude+Photography+Tips&ia=web
Thanks you! I read several articles on your link and I got some ideas.
For example, use a plain background, a girl and one element of props.
And this photo I wanted to focus on the nipple and her lips, which exhale smoke.
Should the guitar be removed? What do you think is superfluous?
I would not want to undress her completely, I think that the coat is suitable here. Yes, maybe the guitar is superfluous.
I think the guitar and the candle are disturbing. The photo is too complicated, it is difficult to focus on the model. (And the lights and shadows, very strong.)
