Don't straighten your hair. I have wavy/curly hair and I attempted to straighten my hair. It did not turn out good. It was so bad it was relatable to goku's hair. So I wouldn't recommend straighten your hair.
I have really curly hair to and I blow dry it and I have a ceramic hot tools straightener that goes up to 450 degrees I use it on the highest setting but if you do that you have to use a product to protect your hair.
DONT STRAIGHTEN your hair if your a guy and its naturally curly...for one guys with curly hair are fricken hot and two people will think its weird fir people our age to do that....just like this one straight haired girl got a perm in middle school, she got teased BAD!