@image box : Much appreciated and Yes you are right , I did not notice sofa was intersecting
@Maru : First and foremost thanks a lot for the feedback, only way I can get better . I responded below
My notes:
-the bright object to the left (sofa? chair?) looks like it is intersecting with floor ( Sofa , and yes I must adjust placing )
-the child (is it 3d or pasted?) looks like it is pasted - the wrinkles on the clothes are very dark, as if there was no or little GI, it could be fixable in post ( it is pasted , but I upped the darkness too much I can see what you mean by its wrinkels )
-there is some strange blurring in the smaller window - I am not sure if it's DOF or some frosted glass, but it looks wrong ( That was not supposed to be frosted but clear , actually no Idea why it came out like that )
-it looks like brightness is different outside of each window ( My mistake again I tried to bring in some detail in PS by lowering brightness )
-the leaves/plants outside have bright outlines ( Please help me with this ,I save as Png to put in my own background post but there is an halo around all my leaves )
-there is some grey background visible instead of sky (?) ( Upping exposure inside made outside way overexposed , again not sure how to fix )
-plants look unnatural, they probably lack reflectivity ( they are evermotion and converted in corona , how do I check for that )