Question on denials of Australian working holiday visas.

I finally have the money to apply for the visa. However I'm just curious as to the chances of it being denied and what I can do to reduce these chances. I've had no criminal convictions or anything of the kind. I'll have the needed money by the time I go (and they don't appear to ask for a bank statement until then). I assume my uk college stuff(An extended BTEC diploma and and two AS levels) counts as the equivalent of a senior high school degree so I put that on the form. Apart from that, can't really think of anything that could go wrong, so are there any chances I'd be denied? I've set my estimated arrival date as the 20th august but I'm looking to get there on the 5th as I'll have the needed money well before then. Thankyou for any answers.