In this video from Bellabern she curls her hair with a curling iron. Section off a piece a piece of hair and use a comb to separate it. Then take the curling iron, put the hair through it and roll all the way up to the scalp while keeping the curling iron moving constantly. Something else you can use is thermal heat spray which will hold the curl. You keep applying this same technique for as many curls as you want on your head. With the bottom pieces of your hair you can curl them a little out. You always want to make sure you get the end of hair through the barrel of the curling iron.