Instead of straightening, why don't you try twist outs or braid outs for more "wavy" looking hair? Honestly, I would kill to have 3b hair.
2c-3a - med width- low porosity - high density - growing out to donate
LOW POO: SM C&H, YTCucs
RO/LI: SM C&H Conditioner, SM C&S Milk, SM Smoothie
PT/DT: gelatin, oil & honey in RO
COLOR: henna, amla & indigo
= wheat, polyquats