Isn't the entire purpose of copilot that it shouldn't need much in the way of training? I think the extent of it at my employer is "this is the one you use."

I've tried it a few times, the only thing it seems remotely good for is when your recollection of a source is too fuzzy to form a traditional search query around. "What's that book series I read in the early 2000s about kids who traveled to another world and the things they brought back from it just looked like junk." Kind of questions.