How to make african american hair curly without it frizzing up?

I want my hair to be nice and curly, without it frizzing up after a couple hours. I have african american hair, its relaxed and I tried products that are suppose to make our hair curly but its failed. please tell me any ideas or tricks you have. NO WEAVE

https://www.google.com/imgres?imgurl=https://www.vissastudios.com/wp-content/gallery/curly-hair-weave-styles/halle-berry-curly-black-hair-weave.jpg&imgrefurl=https://www.vissastudios.com/curly-hair-weave-styles&usg=__heqoQ605vyzZYG0sbYmgbF0RIyM=&h=480&w=366&sz=40&hl=en&start=104&zoom=1&tbnid=0S0hF4eMho3wOM:&tbnh=105&tbnw=80&ei=ok9sTYvjDoSctweq6t3mAg&prev=/images%3Fq%3Dcurly%2Bspanish%2Bhair%26um%3D1%26hl%3Den%26sa%3DN%26rlz%3D1T4ACAW_enUS419US420%26biw%3D1003%26bih%3D374%26tbs%3Disch:1&um=1&itbs=1&iact=rc&dur=235&oei=fE9sTayGEJGftwfVzYToAw&page=8&ndsp=14&ved=1t:429,r:3,s:104&tx=-41&ty=-102
^ heres a link to how I’m hoping my hair could look like.

If i want to get my hair cut but i don't know what the hairstyle is called what should i do?

i want it cut like J.Lo cut hers in the movie enough see?: https://images.allmoviephoto.com/2002_Enough/jennifer_lopez_enough_005.jpg

https://us.movies1.yimg.com/movies.yahoo.com/images/hv/photo/movie_pix/columbia_pictures/enough/jennifer_lopez/enough10.jpg

https://us.movies1.yimg.com/movies.yahoo.com/images/hv/photo/movie_pix/columbia_pictures/enough/jennifer_lopez/enough8.jpg

but i don’t know what that hairstyle is called…also i have african american hair and seeing as my hair is nappy would that be a smart move as far as getting it to stay like that without spending 40 bucks to get it done every two weeks?