I played in Brisbane Grade for a season a few years ago for Redland Tigers, fantastic experience.
I would say, if you can get away with it, travel on a holiday visa, don't waste your working visa the first time round like me!
The club set ups are all really professional in the grade setup (in bris anyway) so just work hard and you'll be rewarded.
Get used to using a debit card for everything, I found I rarely used/carried cash. I got an account with Nab, seemed pretty good, no problems!
And whenever you meet someone / meet them in future, they will shake your hand, regardless. I dunno if that's just a thing that doesn't happen in my area or they are just really polite!
Just enjoy it, its a fantastic chance to learn about your cricket and yourself, you come back with a different outlook on things!