How can i get my hair like this? (picture)?

I would separate your (clean) hair into about 5 or 6 sections depending how thick your hair is or how tight you want the curls. Then with each section, twist it tightly and the secure in a bun with an elastic band. Do this to all sections then leave over night. Then wake up, undo the buns gently, style how you want and hairspray :)