would she be able to find work there if we decided to go before she retired?
Probably not unless she has some really unique computer skills - coding, programming, etc. and even then she'll be competing with a much younger crowd who are more likely to get the job.
Idk how the system works in Canada, but in the US you receive a social security once you hit 65 (you can get it earlier, but you'll get less money). It's only around $1,200 a month per person, but if you have your house paid off and no mortgage $2,400+ is enough for 2 people to live decently in Poland. If Canada has a similar social security system and you can receive it while living abroad you're better off just waiting a few years.
We have been to Poland twice travelled all over and fell in love with the country.
Most people do = )