Merging from CAD market to USD market

[Tobias_ESP]

Hello all, seeking some help regarding merging from a CAD based pricing to a USD based pricing and just want to be certain that I follow the correct procedures!

I own and operate my business in Canada which is why I initially set up my business in CAD pricing. That being said, 95% of my suppliers are US based, meaning I have USD pricing policies and often will need to convert pricing to CAD which was fine when having only a couple suppliers. Over the years, I've taken on more and more suppliers meaning a larger product base. It has become a challenge to keep up with the constant changing exchange rates and I've taken the decision to eventually switch my store to USD pricing with local currency. From what I read online, this means I would import products with USD pricing and Shopify will automatically calculate the local price with the FX rate based on my clients location and local currency. My questions are as follows:

1. When importing products, I can map pricing columns to the following: Price; International Price, US Price. With this new change, do I need to select US price or Price as my store default would be in USD? 

2. Would I be capable of importing CAD pricing files as well, only mapping them to a different pricing column like CA Price (if this exists)?

3. Is there any particular information I should be aware prior to switching? Or is there any steps I need to take before the switch in terms of preparation?

Thanks in advance,