Also English language books are going to be predominantly sold in English speaking countries. And it makes sense cost wise to target both markets together rather than printing individual runs priced for individual countries where possible.
And Canada and the US both use dollars; there is potential ambiguity in price for manufacturers and retailers, so better to clearly specify both. There is not ambiguity with the peso - if a customer sees a book is $10 they will know there is a different price in pesos.
Yes it’s absolutely worth getting in to video games, there is huge breadth and choice on what to play, and a huge vibrant community.
Starting place is really what devices do you have? Do you have a laptop or PC? If so the world is your oyster and you will find plenty to play even if it’s not very powerful.
If you want something popular, cosy and accessible I’d recommend Stardew Valley. It’s cheap for such a great game, plenty of content, great learning curve and a huge wholesome community.
But there is loads of choice - you could play card games or puzzle games on you other devices and explore what’s available. PC games offer much more variety and depth compared to a mobile, and is very easy to access - no need to buy a console or hardware.