Hi my friend, i hate this Critique because they need 100 word minimum hahah DAMN!! My engl is bad for this i hate this limit! Well, this work not convince me because there are multiple problems...
Yes the global work, look natural and this is very important!! But natural way not is enough!! For this i give u 2 stars because the work is clear!
1) the lamp is ok and the reflection on her face is ok too...but the reflection touch other parts too..yes but only just a bit and only little portions----not is a precise example [link] U can help u tracing "line direction guides..." be creative and imagine where the light can go and where not!
2) u used a model with day light...and u not worked good her, because there are too many daylight lights on her hands and harms..and on her back and bottom.
3) the background is too confused. Try to use clear and well visible background always.
4) The girl and the background are unlinked between their...because the background is anonymus and the girl seem pasted there.... she seem pasted on for another reason....because she got shadow-highlights problems
5)Give breath to these scene......she is watching up-left corner....and u had interrupted vision of her! The topic is hard and i had started to explain it in some tutorials but i hadn't end them! I must create others tutorial about right vision and wrong vision.
6)Force u to use "the 3 rules" in this case is needed respect that rule....(if u know it ull know why...if u dont know it, its simply...use google )