need help wit waves

yurp whats up...umm got a few ?'s about waves   well first im white but my boys helped me a lil teey gave me they hair grease they used cause they said first i need to train my hair to lay flat n i pretty much got that donr n i kinda got 1 wave in the bac of my head but idk  but im tryin 2 get the hole head i no u gotta get some kinda cural activator but any one got an suggestions for me ?, i no the whole durag thing were u got to wear it on the daily an to brush alot but   theres a pic of my hair under this so it gives yall an idea ya dig

its gonna be hard becuz ur hair is naturally srt8 the curl activator might help but i recommend and wave kit