I am not sure how it works with going through the Canadian approval process, but for me once I got the surgery date and confirm that date would work for me, they sent me out the confirmation letter, which also includes everything you need to stock up on. If you message me, I could send the documents they sent me.
In terms of hair removal, Brassard's preference is not to have any. If you have any they say you should wait 1 year after the last treatment before having surgery. Not having any hair removal does have some risks, but I could not find any recently surgeries that have had that issue. There are some people who have had internal hairs, but they surgeries were several years back.