You can not automatically get a work-visa through marriage. There are options available for family of an Australian resident, but you still have to apply, and there are caps in place. Read more on the immigration website

However - there are options to extend your holiday-visa for a second year, at which point you can then apply for sponsored work-visa, after which you've been around long enough to apply for residency. Again - the above website covers the gamut of what you can do. I suggest more research there :)