can’t figure out my hair type helppp

Growing up, my hair was straight with a slightest bit of wave. But it seems to change in time i guess or i use the wrong products for my straight hair. I have really really thick hair also. Whenever i wash it, my front strands always curls and the back of my hair stays with the slightest bit of wave. And when i do the curly girl method my hair just looks so frizzy. The back of my hair doesn’t even curl with curly girl method and scrunching. I don’t know if i have curly and straight hair at the same time or if it is possible. Now i just let my front strands curl and i curl the back of my hair with curling iron. Any suggestions?