Absolutely beautiful. This is up to preference, but I recommend in future paintings trying to sharpen the details even more. I can see the fierceness and mystery in her face, it's sharp and angled displaying a hardened and sly look. It's really edgy and I'm living for it, but I know you can push it farther. Sharpen things up, lean into the cold, dark, edgy, mysterious vibe you've got here. Maybe darken some of her blacks, her stunning blue eyes and the hand are the focal points so make sure to really sharpen those.... especially those eyes.
Honestly though, it looks great, this is just some stuff to add into other portraits if you really wanna take it to the next level. But amazing work! Keep it up!