Becca Kerr

Could any primary school teachers give me some advice please? I am applying for a PGCE to teach and really keen to do Primary, but it only offers 190 visa, I am considering doing PGCE with business to teach secondary and have a 189 visa available. But what are the actual differences? I don't really understand- is it just areas that need a primary teacher would invite me for the 190 and I have to live there for 5 years before I can apply for residency? It's so confusing! I would like to live in NSW or QLD after living in VIC for 18 months, I must prefer somewhere a little hotter! Any help would be much appreciated!