@John ******
you can do car and motorbike at the same time, providing you have your home country licence showing you are already qualified for both, if you have an IDP, then you are not required to carry out a practical test, just show you’re not colour blind when it comes to traffic lights 😉 if you don’t have a licence to ride a motorbike on your current home licence, and you do buy a motorcycle then you will need to carry out a practical and computer/video based exam