Join Date: Aug 2009
Location: New South Wales, Australia
I second lessons. Lessons are essential in teaching people the correct cues needed to make the horse understand what you want.
Confidence is key in horses. They want to be shown the right way to do it.
Besides that, perhaps ask for a canter out of the arena, such as on a trail or something, maybe slightly up hill. Cantering on a circle, or on uneven ground, can make it much harder. If your mum and cousin are more experienced, then perhaps they can teach you?