hiya st3rius, welcome to the forum.once you have done your CBT you can only ride a 125cc machine,the varadero is a good choice because its a honda, and its physically a large machine.. as for restricting larger engined bikes,that for when you pass a restricted test and are not allowed to go above 33 bhp. so get the CBT done and pick up a veradero 125 as the first steps to getting your full license , you dont say what age you are and that will determine what test you can take,look here
Minimum ages and rules for learner drivers and riders
and here
Motorcycles you can ride for more information
....................Sam