You're an adult and it's your body, if you want a vasectomy, get a vasectomy.
That being said, I was 100% sure I didn't want kids when I was your age. Now I'm 37 and trying to have kids. Obviously that doesn't mean you'll change your mind, but it can happen.
You really don't need to wax the quick link. All the surfaces it will have contact with will have wax on anyway.