Ok i have Straight medium length hair and i don't know what to do with it!! (picture in included)?

go to a store ex. walmart, that has the sponge type rollers. they come in different sizes smaller ones make hair more curly. i use these for my 3 yr. daughters hair. just wash hair like normal. when it is damp not wet roll allow to dry. better to roll at night and sleep that way it will definitely have enough time to dry. these give my daughter curls. and no heat involved.