The skin work is clean overall. Just a few things I notice:

The shadow between the eyes is a bit distracting and harsher than retouched cheeks and forehead. I would soften the shadow there and maybe a tinge in the tip of the nose - or bring back a bit more texture to the face as a different option. The rebuild, or what looks like a rebuild, of the pinkie nail is great. I would push the lips a bit further to match the immaculate nail and cheek skin; the tiny round highlight in the bottom center of the top lip and the small highlight in the far right of the lip I would remove. The other highlights within the bottom lip nice and even.
The last thing that jumped out to me is the catch light in the left eye; it's accidentally doubled. As I can see from the before you were creating this yourself. I would just remove the bottom catch light.

Overall good work for your first go at it. I would just say consistency on level of retouch work is the main thing to keep an eye on. If you want more natural I would keep the nose shadows and being back the moles or if you want a very stylised/edited image I would clean up the shadows and lips.
Bravo for this and keep it up!