Can I drink beer after 20 days of hair transplant surgery?

It can take 6 to 12 months after surgery to see results.  Some may see hairs growing 3 months after the surgery.  If you are concerned it is best to contact your doctor.  

5000 grafts seem like an extreme amount of harvesting as it shows on the photos you provide.  Based on Dr. Rassman's article it would seem it is over harvested. 

Facial hair growth is a genetic trait.  If you have very little facial hair there isn't much you can do to increase the growth.  L-lysine is not a DHT blocker.

It can take 6 to 12 months after surgery to see results.  If you are concerned it is best to contact your doctor.  Signs of a successful transplant is when you see the results and you are happy with the results in 6 to 12 months.  There isn't much you can tell in 14 days.

Grey or white hair is a genetic trait.  Transplanting hairs will not make your hairs black as the black donor hairs will also turn white.

If you are considering surgery and confused about what was recommended by your doctor, it is best to ask your doctor to clarify any issues.8000 graft FUE does not sound right.