Can I scratch my donor area? It's not itchy but I feel I need to itch and remove the dead skin from the back of my head.

If a social situation or event necessitates the use of headwear, I would recommend a loosely fitted baseball hat or a carefully placed beanie after 24 hours has passed since the time of your hair transplant procedure. Check that the underside of the cap or beanie is not abrasive, as a rough...

The white dots you are seeing is water logged graft edges from the shower and as you know that when your hair gets dry the white dots go away

If you have diffuse hair loss, you may not be the best candidate for surgery.  You must also consider that normal hair density is about 200 hairs in a square centimeter for an average non-balding person who has about 100,000 hairs.