Nice concept but it's too bright, her arms, hands and even the dress basically blend with the background. By the way you should make the dress a little transparent to look more realistic, with all that light you should be able to clearly see her legs (the shape).

Akassa, thank you for the tip of the legs should be clear that due to luminance.
Subtly I made this change, I hope that is noticeable!

About too much light in some parts of the body, well, my personal view is that blinding light of heaven.

Thank you for your comment and help!

overall composition is good.. only complaint is that she looked 'sad' to go back to heaven?