I took my bike test when I was 20 - 3 years after passing my driving licence. My dad had made it clear that he had nothing against me riding motorcycles (he has a bike licence himself), but that he would prefer me to wait until I'd acquired a reasonable level of experience in a safe tin box.
Your dad was a wise man. All the training in the world is no substitute for experience on the road. I intend to take a similar approach with Tmg Jnr.
