Bantu knot outs!!! This style saved my life (and my hair) It's perfect because it'll blend the natural curl with the straight relaxed ends to just have bouncy curls that all look the same. I made a video tutorial --> BANTU KNOT OUT. - YouTube
but i definitely do NOT have thick hair, so here's another video from one of my favorite youtubers --> How To Bantu Knot Out "Natural Hair" Style - YouTube
and here's what it looks like on someone with relaxed ends --> Requested Tutorial: T'n'C Curly Fro - YouTube
that last one is technically a twist and curl but it gives somewhat of the same effect.
hope that helped!