Instruction at home, learn with the best instructional videos
How can I prepare for the competition?
The exercises you ride in a class are not just any exercises. They all have a purpose. If you have something not in order in a certain class, you will come across this over and over again in the higher class. That is why the dressage tests are structured in such a way that it is a good indicator how far along you are with your training. Each level is a preparation for a higher level to eventually reach the maximum level of training in the Grand Prix.
Starting too early in a higher class is harmful to the horse and its wellbeing. Confirm the base, so the level in which you ride and train exercises from one class higher.