Interesting. But most likely the application will be refused as you don't have a valid passport.
You can apply without an explanation and try to make an update afterwards when you get a new passport.
You mean a visitor status? Why would you need to covert?
If it's primary or secondary, they won't need a study permit if you have a worker status. But they need a status anyways so the kids can apply to change for a visitor status .
It might help
How can I show a potential employer I’m allowed to work while I wait for my post-graduation work permit?
You can show a potential employer you’re allowed to work by giving them a copy of all of the following documents:
proof that you completed your program(s) of study, such as...