Basically you can't .
This is a Buyer Protection policy, based on preventing scammers from selling counterfeits cheaply and disappearing with the disappointed buyers' money.
This is also the reason why your customers' cleared payments are being Held* by Paypal for 21 days against your good performance.
To some extent it also protects the new seller from scammers who may win many items and then make phoney claims of non-delivery or 'not as described' to get the items for free.
The other seller protection, again one that anxious newbies may dislike, is prevention of overseas sales. Shipping within North America is tricky enough.
When you can ship overseas, remember, NO surface shipping ever. Air Mail.
*I hope you have noticed that you can use the Held funds to purchase Paypal shipping labels for your customers. There are discounts of 5% to 18% off PO counter prices for these labels. A small blessing given the high cost of Canada Post shipping.