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
POOS: Sevi Seabuckthorn, Neutrogena Anti-Residue
RO/LI: Suave Coconut / KCKT
PT: CNPF, gelatine mix
COLOR: henna, amla & indigo
= humectants in low dews