I need help with my hair?

I'm going to be a senior in high school. I've always had the same hair since I was 11, now I'm turning 17 in a few weeks. I've always pulled it up in a pony tail. Since I'm going to be a senior I figured it's time for a change. I'm biracial. My hair is uber curly and thick as can be. I need to know what I can do different with it.. Or is there a method of perminit straightening that will not ruin my hair.. And if you have ever had the Japanese hair straightening... What is the outcome after it where's off.