what does the signature say? very pretty and I'm bad at cursive
good things:
proportions seem pretty great
looks like the hair took forever, nice, I'm always too lazy for hair
things to improve:
the nasolabial folds, usually its best to ignore them when u start, esp in cases like this where u didn't shade anywhere else
--> and with that, shading: I assume you are doing realism, real life has shadows, yay
contrast, darks should be darker and lights should be lighter
better photos are such an easy way to improve, crop out the table or whatever the blue thing is, turn up brightness, etc