How do I make my hair wavy/curly like this?

buy a 2 inch barrel curling iron that gets high in heat, start curling from the bottom and twist your way up. take about 1 inch sections, and leave about an inch maybe more at the end so the curl looks more natural, to stay away from spiral curls, you have to use a bigger iron. it takes some practice but you will get it eventually and it will take you like 15 to 20 minutes tops. always finish up with a little bit of hairspray for hold