take your time with it all. I would suggest mastering 1 method at a time. Start with sports promo, then start hitting racing up slowly. Much more $ to be made with racing so you have made a solid move.
In terms of VIC agencies, ask in one of these forums >>
I am from VIC so can confirm with you the ones that work.
Neds works for VIC btw. Just need to sign up via the link in the neds forum, bet the $500, cover it on another bookmaker or Betfair
Can also check this out >> https://profitkings.wpengine.com/bookmakers-index/