In terms of being a "professional artist," it's good to get as much as you can on your resume. The more Canadian content/works you get, the better, as the funding will typically go to whatever enriches our culture specifically. But it sounds like you're on your way to doing that; just keep that focus. It looks like you should be okay so long as you cross your Ts and dot your Is.
As far as publishing goes, have a look at the OAC's
Writers' Reserve program. It basically puts the money into publishers' hands to dole out to writers they think have potential to produce something publishable. In your case, be sure to look at Talonbooks, based out in Vancouver. The publisher Karl Siegler rigourously publishes drama and does a good job of it. Other than that, be sure to submit your Writers' Reserve proposals to publishers that would actually consider publishing your work because that is the kind of stuff they value. Since you have a work already produced, that is the least Talonbooks looks for to consider you for publication, so I don't see how that couldn't help your Reserve proposal.
Have a look here too:
The Association of Canadian Publishers - Writers' Grants
But, generally speaking, keep publishing works of all kinds in indie publication, literary magazines, journals, etc., it's this kind of track record the publishers look for...plus they'll get to know you by name because the publishing industry isn't that big across the country. It helps to get to know people by attending events and readings too. If you want to get published, you can't easily do it locked up in a cloister. Publishing is a communal thing. You are already geared toward this being in theatre; just remember the public/performance thing applies to fiction and poetry too. It's not just words on a page.