Come back OP and tell us how your hair turned out. This is a little late, but I would suggest. 1st option:
washing your hair with a sulfate free shampoo/conditioner, rinse out with cold water for at least 2 minutes. Apply a curling product like gel or activator. Do not comb, just rub entire head with the palms of your hands in a circle. You hair should coil/curl up. Afro hair is curly hair.
The curls just need to be conditioned well. 2nd option
: find a professional stylist who knows how to do good texturizers. With a texturizer it is a matter of proper timing to achieve the curl/coil pattern. If you choose to do it yourself (which I do not recommend) the S-curl texturizer is a good one to use. I used that on my boyfriends hair when I was a teenager, and it looked really good.
Give us an update.