I only discovered this a year or so ago & have still yet to try it. Love the idea.
I highly recommend going to Canada for your first try. Preferably somewhere in Montreal. There are some good places in Toronto too.
If you can't make it to Canada just make sure it's cheddar cheese curds and a good thickish gravy (needs to coat well). It's not a traditional gravy either but a good beef (or mushroom) one will suit as a substitute. It's also thin chips, not thick. Skin on is nice but not traditional.
Most importantly, make sure the gravy is hot and you just pour it over the curds to melt them. Don't melt the curds beforehand. Some might not melt but that's OK. It's all part of the experience. You want that squeak still in some of them. Curds are a bit like halloumi cheese in that way.
Ignorance, there is a cure.