If you haven't got a retractable endorsement do one in a C210, that way you have a bit off a cleu about the 200 series. and a few hours on the type you will likely fly if you go up north.
Personaly i wouldnt wait and do my atpl's 1st. go and get some hours, you can still studie at night, during waiting time on your charterflights etc.
have you got contacts up north??
pm me iff you want some info.
cheers