How do I go about getting waves?

Ever since I was small, I had nice curly hair but I never got waves because I didn't put in any work towards it. My hair is short so now I'm buckling down. Right now I'm working with Olive Oil and Coconut Oil grease, a soft bristled brush, and a do-rag. I brush brush brush and apply grease during the day, and then throw on a do-rag at night. I've been doing this for only a day now, but I'm not sure if I'm correctly doing it. Am I using the right grease and how long does it usually take to start seeing results? How often should I wash my hair?