Photoshop Retouching for seamless Integration of Engagement Ring

I have an existing photo of a couple and a hand with an engagement ring that needs to be seamlessly retouched into the image with the colors of the whole image be adjusted, as the current tones are too brown and lack intensity/realism as well as the ring not being radiance enough.

There is a third image a woman placing her hand on the man’s shoulder which I believe could be a good fit for this project. However, I’m open to suggestions if the expert finds a better solution.

The final result should look flawless, with no visible signs of retouching, and the colors should appear vibrant and natural.

Requirements:

- Expertise in Photoshop, especially in retouching and photo manipulation.
- Ability to create a perfect blend between the original image and the retouched elements.
- Provide the final deliverable as a Photoshop file (.psd) with all layers and adjustment layers intact, as I may want to make minor adjustments later.
- The final file must be delivered by Sunday, August 25th, 18:00 Central European Time.