I subbed up here bud. I'm about 1 week away from doing my first grow, berry ryder auto's. I too chose auto's because of the learning curve before i get into anything too complicated.
I wouldn't top your plants as ive heard that can stunt auto's, but LST is fine.
wish you had some pics up, i think people will be able to help you much better with a few. Good luck, i'll be watching and trying to help and learn myself.
-kslo