I am 18 and am worried about balding

I am 18 and my father has lost a lot of his hair in the back of his head. Have I started balding in the back of my head?

You seem to have black hair and have combed your hair so that the scalp is showing, This is not balding and anyone with your hair color who combs their hair this way will see their scalp. Stop worrying and go on with your life as if you are not balding. Maybe sometime in the future you will follow your father’s pattern of balding but it is not present now.