An unfortunate timing of events

[Paul1]

Hey people, so to keep it short...

* On Friday evening my training at a grocery store begins. Yay, I have a job!

* I have an interview on Friday for a professional IT job, and haven't been told the time, let's hope it's in the morning.

* I don't know the Canadian market, and don't really know when the IT company will let me know if I am successful. I assume the maximum time will be a week, but hope it is likely on the spot.

* By this time, I could be starting a job at the big chain grocery store.

* If I get an IT job offer, of course I want that over a shop job. But money is tight as I moved to Canada from the UK and started from scratch. I can't afford to let the grocery store go for a "maybe"

* What do I do if I have started work at the grocery store and I get an IT job offer? What is the notice period in Canada? How do I quit the grocery store job gracefully without letting them know I'm going for a professional career?

* What am I going to do if the training and interview time periods overlap? There's no way I'm going to miss that interview?

* I hope none of you know who I am