I hope you get through for your training, but don't count on it. I returned to Canada after training in the USA for a week and have been quarantined. We flew back as operating pilots on our company aircraft on company business but were told that the rules recently changed. Travelling for training whether you are operating as crew or travelling as a passenger, you must quarantine. Same goes for travelling to the USA from another country. We attempted to drive across the border to pick our plane up in the USA and then take it for training and were refused entry via road. No amount of explanation or documentation would sway the Border's Finest. We ended up driving to a small airport a few miles from the border and flew on a light single to BUF where customs didn't even ask a single question and let us on our way.
The take-away is this: Do not assume that you will be allowed entry without quarantining. Do not assume anything when dealing with the border because on any given day the rules are being interpreted differently depending on which way the wind blows.