Memphis, Tennessee Trainng for half ironman

I am new to triathlons. Since the age of 4, I've been an athlete. I have played and enjoyed almost every sport. I've completed several half marathons and one full marathon. Without training, I did the Wolf pack tri 2 years ago. Recently, I realized I wanted to accomplish something significant...a half ironman sounded good. I welcome all advice, training tips, etc. Also I was wondering if anyone in the Memphis area knows of locals who train together or would want to train with someone. Thanks.
Shane