How to improve your photo
Pay more attention to the edges of your frame - Do you really want to include the ceiling in the shot? Does that angle tell your story fully? In this instance, as I said above, I'd probably have moved over to camera left to get more of the church in the shot. I also would have changed my angle. I would crop in on the bride - at least to the peak of the window. There is a lot of extraneous space that can be cropped - as the rows of pews and the windows tell you that it's a church, her dress tells you she's a bride.
Try changing her position inside the church - find to your best lighting and use that. It would take very little to show that you are in a wedding chapel or church, since she is your subject, allowing the background to fall off wouldn't be detrimental to your photo.
The pose is very masculine. I would have used her standing with her hands clasped in front of her, her face smiling and happy. I'd have had her standing in front of the pulpit, or for lighting, at the window, from the shoulders up, and angled back (landscape) to show the church.