Hi -
To become a Pro for the first time, an Aussie William Hill account won't work. It has to be a brand new account made through one of the sponsor links up above and William Hill Aus isn't one of them. I had to make a new account at another book when I first became Pro because I was in the same position as you with an Aussie account. After your first year you can renew as long as that SBR created sportsbook account is still active and funded or by making a 20EUR transfer to SBR via Skrill. These are the current rules but they may change in the future. Hope that helps!
@chidondollars - charity donations are only for US residents which this poster isn't