So, I've done this a few times before.
I shower, only using conditioner. I brush my hair in the shower. I dry my hair with a towel so that it is still damp. Then I put leave in conditioner in my hair, gel specifically for curly hair, and hair spay and I scrunch my hair with my back bent so my hair is hanging forward.
I let it dry like that and I go to sleep with it out.

When I wake up most of the curls are intact, but there is some frizz, so I put more of the leave in conditioner on the ends.

The leave in conditioner I use is sort of light and slightly oily.