Although coconut oil is regarded as one of the greatest oils for healthy hair, there are other oils that work just as well, like almond, castor, and olive oils. However, utilize the oil you choose wisely; simply applying and then washing it out won't help you develop or maintain the health of your hair.
Allow me to give some advice that my great-grandmother, myself, and my child used a long time ago.
For thick, black hair that is healthy and free of dandruff
Grab a litre of coconut oil, curry leaves, fenugreek (50g), henna leaves, hibicus flower and leaves, black pepper a little (its good for dandruff prevention), amla, cloves for fragnance, small onion (4 to5), brahmi leaves, all leaves  measuring your one hand full. Make a paste of all these leaves and onion by grinding it using the mixture pour only 5 to 10ml of water if required for grinding.  If you dont get fresh leaves you can get powder of these leaves from shop or online. 

Now take a  wok(kadai), it should be thick one, put it on the stove heat the wok(kadai) slightly to get it dry fully. Now pour the litre oil in the wok and add fenugreek, cloves and pepper, add the paste soon. slowly start to mix it with a spatula, gas flame should be inbetween medium and slow.  It takes time so mix it spatula slowly often, dont let it burn, 15 to 20 mins now you can smell the fragnance of the oil, close your eyes and feel the fragnance. now can see the oil getting separated from the paste and the paste sediment in the wok. Just put a curry leaf in the oil it will brust like mustard, now off the stove, let it cool down.

After few hours or once the oil gets cool filter it to a bottle and keep it for month. Use this oil weekly once. 

How to use the oil?

If possible use to ten drops daily in the scalp

Weekly once maasage your scalp with this oil, while using it heat it (warm oil), heat must be like u can touch it with your fingers. keep it for half and hour and take a wash with mild shampoo. 

DONT LEAVE YOUR HAIR DRY,

You will face split ends, hair color dullness, damaged hair, dead hairs, hair loss.

Comb your hair gently, feel the hair and love your hair.

Beauty is in the eyes of people who see them throught various perspective, for a mother her baby is beauty, for a hungry person smell of food is beauty, in nature the vibrant colors are beauty, for cuckoo her voice is beauty, a lot to say. But the meaning of beauty vary from person to person