Oh but DD - its much easier to just pull on the front end, after all, it's not about feel, its about sight, you can see the head and neck, so focus on that :)
Ok Tayz, here's a good thread to get you started: As you will see, dressage is far, FAR more complicated than pulling on a horse's head to make it arch it's neck. Its an extremely complicated discipline, demands a huge amount of patience, feel, timing and knowledge from the rider to be even mildly successful.
If you are really keen to get started in dressage, there is nothing that will help you more than an experienced coach. Depending where in QLD you are located, there are multitudes of very good coaches and riders available to teach you. QLD and NSW is abundant in good coaches! The mysterious half halt, causes and effects.