You’ve got: Straight to wavy hair
You want: Curly Hair

charlize theron How to Combine Hair Products to Get Hairstyle You Want
Styling recipe: While slightly damp, set your hair into small sections using small, curlers. The smaller the sections, the more volume. Once your hair is dry, use hairspray on each curl and at the roots for added lift.

Try: Head to your local dollar store or beauty supply store and look for plastic rod rollers (the kind they use for setting perms). You can also use plastic straws (which may or may not work). Just take your damp hair, twist it around the straw.  Using booby pins, pin the ends of the straws under the rolled part.