I would recommend looking into the curly girl method. There are some sticky's at the top of the forums that explain that better. The difference in your patterns could just be damage from straightening. Good luck and welcome!
Katie
2C/3a, Medium Texture, Normal porosity, High Density, Normal Elasticity (so says the LCLF Hair analysis)
Co Wash: As I am
RO: Yes To Carrots / Ion
LI: Biotera / Samy Big Curls Defining Cream
Gel: FSG, Volumax (Original and Mega)
Color: Henna
Tools: Diffusing