Not fully satisfied with this, but I'm out of ideas to make it better at this point, so here it is
View attachment 2544249
As mentioned earlier, it is quite a nice render already. Though, I guess if you want ideas to spice it up, maybe tweak the lighting by changing the color temperature to indicate a different time of day, looking at it more she seems a little over stretched in that pose might need some tweaking to make it look more natural or go for something a little different.
Could be how the lights are set up, but the figure behind the door seems a little high if it is a human figure and the framing at the bottom feels weird, I would probably change the angle to include her other hand at least and a bit more of her legs.
And perhaps a small light to give her eyes a little shine. This also depends on what type of render you are trying to make or what type of feelings you are trying to get across to the viewer. Looking forward to seeing what you come up with.