There are plenty of Maritimers in DVC, they just had to buy a different way. Some US states have this problem as well (those farther from FL and with smaller populations). I know our pal MBB is a Nova Scotian and there are a bunch of others.
Your DVC purchase and information options are limited by this unfortunate fact. The easiest, but not cheapest method, purchasing direct from DVC from your home, is not available. This leaves you two other options: buy direct from DVC in Florida, or buy resale from home. Of these the latter, resale, is the cheapest option generally, plus it provides you with more options for your home resort; one consideration here is that you would need to pay up front for all your points. But buying direct, on the other hand, allows you to finance the purchase thru DVC, tho I am not sure of the terms for non-US buyers.
One option might be to reserve a DVC resort for cash, then if you go on the tour and decide you want to buy, then you might be able to arrange to pay for your stay with points you are buying then, and get the cash paid for the room applied to the downpayment (not sure if this would work with SSR selling uncompleted buildings at present - perhaps if you were staying at a resort other than SSR).
As for perusing the way it works ahead of time, you could always have the info sent to someone in a jurisdiction where DVC is already approved (a friend in Ontario or in the States) and have them forward the stuff to you in NS. The website is only marginally informative, unfortunately, but that may give you an idea of how it might work. I for one would be happy to trans-ship materials for you, but perhaps an Ontarian (already in Canada Post) might get it to you more quickly.
Good luck!