I work for WP training barn. From what I see, much of this depends on how well horse is trained and how willing you are to listen and practice what the trainer is telling you to do.
These horses are "rode" constantly when showing, rider constantly is working to keep horse going correctly, and still has to make it look as if they are just up there. No major corrections in other words.
The ability of the horse, and the depth of training and how well the trainer does their job is of paramount importance to be successful in WP.
Lots to remember, use and keep in mind when in ring. Actually I think pound for pound so to speak, showing WP is one of the harder disciplines to learn well as it looks so "darn easy".
Listen to everything your instructor tells you, take full advantage of every moment you can spend at barn, even just watching, and I would also suggest watching as many of the WP videos from various shows, to identify things that you need to work on, how it should look and educating your eye for WP horses and riders.
And work, work, work. You can do this, and you will enjoy it too.
Horses make me a better person.