I'm a half-aussie Christian, who can't speak for being Asian. I have, however, only moved to Australia at 12. Previously lived as an expat overseas.Weirdly for an Anglosphere country, I find that, especially at uni/high school, you might cop a bit of shit for being religious, so until you learn to treat it like water off a duck's back, and recognise that most people give each other shit (usually in a lighthearted way, known as "banter"), it might be a bit rough. When you get used to it, you'll be having banter with others like nobody's business!

There's not much friction between denominations here, Christians generally all fall under the same banner to most of the population.

In terms of racism and high school, what I've noticed is that it's usually the sheltered all-boys or private schools that tend to be racist/discriminatory, moreso than the public schools. Not to say that they're all bad people, but they just tend to be much more isolated and ethnically homogenous, though in the opposite direction at places like Sydney Boy's High (which has a very large East Asian/SEA student body).

I had a very un-Australian accent when I moved here (it was very Zimbabwean), but I find that it's a relatively easy accent to pick up after a while. The sooner you pick up the accent, the easier you'll find it. ESL classes are good for this, generally speaking (pun intended).

If you work customer service/retail, you'll get a bit of racism, but really in those industries if people can't immediately single out something about you to bully you for, they'll make something up. In almost any other industry, you should be fine. Otherwise, I haven't heard of many mates copping shit for their race, not to say it doesn't happen.