Curly hair help pls?

my hair is curly after washing it, but when i comb it, it pouffes out, the curls are gone and it looks like a broom; i can't use a leave-in conditionner because i have oily roots (but it would be good 4 the dry ends though). i wanna have shiny curls and no rebel hair! pls tell me, what product/easy-to-prepare naturist stuff can i use?