Sorry, Faith, I forgot to mention something.
Also with a texturizer, it may mean less work for you. And like someone said you'll have both worlds with a texturizer. You can wash and wear (your hair may turn out wavy since it's 4b), and then you can press it for whatever.
I did one for my mother's hair, and it came out fine. No breakage or anything. But if you ever change your mind, GO TO A PROFESSIONAL! /images/graemlins/shocked.gif