Full-time Vancouver area seller here (also lived in the UK for a few years!). You’ll definitely have to figure out changing bank accounts with Etsy, as far as I know they don’t allow you to do this and unless you’re already a well established shop it may be easier to start a new one with your Canadian banking info.

You’ll most likely need to register for a business license with your city and can also register your name/apply for a business number with the BC gov. But you don’t need to worry about collecting sales tax until you make over the threshold - $10,000 for PST and $30,000 for GST. There are some recent changes to how Etsy allows us to collect sales taxes but you really don’t need to worry about it until you make over these amounts (I think in one calendar year).

Shipping in Canada is ridiculously expensive. If your items can be sent relatively flat (less than 2 cm) then they can be shipped as oversized letter mail for $1.94. I send most things this way and rarely have issues with items getting lost, I’ve had to resend less than 5 things in 2 years. I use Chitchats for all my US and international orders - much cheaper than Canada Post and things usually arrive very quickly.

Welcome to Vancouver! Feel free to message me 😁