Hey Sadhairloss,
Im my opinion, i think 23 is too young to get a hair transplant. Im 23 years old too ... and not far behind you in my hair loss.
It may look good for a few years, but hair loss will continue around the areas where you had the hair transplant, and then it'll look much worse. And with a scar on the back of your head, shaving your head may not be an option.
At the moment, i buzz cut my hair to either a #1 or #2.
Besides, you have a dark complextion ... so i were you, id just shave your head. It looks more athletic. If i was darker skinned, id just bust out the razor!!!
TRUST ME!!! SHAVE YOUR HEAD!!
...... and if you dont like it, let it grow back for a month or two, and then go ahead with your hair transplant.