Wash your hair properly, put some olive oil in your shampoo and conditioner, make sure their sulfur-free. After your done and have dried your hair to a damped state put your preferred oils in your hair (so the hair dries with the oil in it) Comb it out in that state as well and cup your hair in your hands and scrunch in an upward motion, holding it a few seconds each time to get more defined curls. Lastly, let your hair air dry. Don't use towels after this state because wet hair is vulnerable you can easily lose hair strands and push back your hairline if you put it up in a towel or a but, just let it be
Coconut oil can lead to protein build-up and leave your hair drier, so I would advise you, if you use coconut oil, to not 1. overuse it and 2. Use it after your hair is already dry and to control frizziness and not when your hair is damp and freshly washed
Hope this help