I have 3c hair also,(i think, could be 4a, pretty sure its 3c tho). Any who. I love to wear an afro. I had one 2 days ago.
Heres how I do mine:
-I co-washed at night, and added my moisturizer and oils or what ever you like to add.
-The next morning I spritz my hiar with a conditioner water mix. Use what ever butter I like that day, and a touch of EVOO. (my hair is a damp, not dripping wet.) If its soaking wet it wont stand up right.
-Then I just pick it out. I pick and pat, and pick and pat till I get the shape I like.
Some times I will add a little more butter to be on the safe side.
My fro stayed very moisturized all day.
HTH Good luck!