I put the top section of my hair up, if your hair is thinner you may be able to do larger sections than me. But my sections are about 1-2 inches. I tease the roots of each section right before I curl it.
I hold the curling iron upside down and curl each section around the outside of the barrel (do not use the clamp) away from my face. I usually leave the last inch or less of hair uncurled. Be sure not to burn your fingers!!
Continue this on each section! For the top sections, don't curl hair starting right at the base, but a couple of inches down so the hair falls on your head more naturally.