You can tell which instructors have the confidence in their solid understanding of riding concepts based on how much they love it when riders ask them questions. Those who do not like it when students ask them detailed questions often do not truly know how to answer them.
Confidence is something you need to build for yourself. It is something you have to actively pursue and proactively work to maintain.
From Facebook fan Caitlyn Marie Lear ~ "Be a friendly boss [to your horse], not a bossy friend."
Since the various available lateral movements all work to supple the horse's body in a slightly different way, it is a good idea to use bits of all of them in your training. Don't just do your favorites.
The rider who keeps their weight too far forward at the gallop will cause their horse to gallop on the forehand. When the rider's weight (center of gravity) is correctly above the center of the saddle at the gallop, the horse will be able to more easily gallop