Try this method of sharpening; it uses a new layer so doesn’t alter the original image.
Start with your image and duplicate the Layer ( Ctrl J is a useful shortcut).
Go to Filters/Other/High Pass
This will turn your duplicate layer into a grey image with the edges of objects in the images showing slightly darker.
It looks awful but don’t worry. Adjust the slider control to show some edges but not too much – you will need to experiment. Then click Ok .
Finally – change the Blend Mode to Hard Light and you will see the image “jump” into sharpness. You can reduce the Opacity slider if you think the image is too “crisp”.
That’s all there is to it!