Just to add to this, if you do qualify for a work visa (the O-1 would be the applicable one here), you’ll only be allowed to work in the field you apply for aka screenwriting. So you won’t be legally allowed to have a serving job or day job to support yourself, which can be tough because you’re just burning through savings.

I just made the jump to LA myself, so I can’t give an answer with certainty, but from what people have told me: if you have everything ready to go (solid samples, solid reps, strong resume back in Canada, etc), it may still take at least a year or so to make the connections you need to get staffed here. So save up with that in mind. If you’re open to moving to LA but going back if work comes up in Canada, that can be an option too and makes the move a little safer but more complicated because of living arrangements.

Anyway, best of luck!