It's a charming picture of a lovely little girl, I know this isn't the critique gallery but if I may suggest that when photographing small children it helps to avoid dwarfing them to get down to their level, I hope this helps.
The soft shadows and tones, lovely grain, her bright attentive expression, and the obvious confidence and trust in the photographer, all good, all excellent.
@benjiboy Thanks a lot. I understand you point. Of course critique is WELCOME ;-) But, in this image I wanted to frame little María in the stair, as if she were going up.
Cheers!
Antonio