Apply texturizing cream. You can buy this at many beauty supply stores. A reccomendation would be S-curl but you will need a large afro.
After the texturizing stage wait one day then wet your hair. Dry it in a towel and apply an instant curl activator, then finger comb your hair. A reccomendation would be care free curl gold.
Jheri curls were very very greasy so after you put the activator in spray a large amount of moisturizing spray all over your hair. Enough for it to be very greasy.
When you have a lot of spray in your hair, shake it around to get it deep in your hair. Then finger comb.