These will make the biggest Difference! Curves can be used to easily adjust Light Levels and Colors in your images. We don’t have ay Lights or darks, so I’m going to bring down the Shadows and brighten up the Highlight areas under the RGB dropdown option. This is known as an “S Curve,” which adds Contrast.
Use the Hand Tool to adjust only certain areas of the image, and play around with each Color Channel to remove and add certain Colors.
This can be done many different ways but High Pass is my favorite. To do it create a Stamp Visible Layer and change the Blend Mode to Linear Light. Then go to Image-Filter-High Pass to adjust how much you want to Sharpen.