My son is 12. Go with your instinct. Give them enough rope to either tie themselves with it or shine.
See what they do. With my son, he is fairly responsible as far as not doing stupid things, but not responsible enough to let me know where he is always (he is also ADHD so that plays a part in his actions). Be their parent, but not their buddy. Let them know you will be there for them, but you do have boundaries. I do hope he has some books on adolescence and the changes his body will have. Those are the only ones I have for my son – not ant parenting.
They are graphic, but in cartoons (as in Dilbert-like and as opposed to actual photographs) for the changes the body will go through for both boys and girls.