G'day Mike. First of all, welcome to the forum and the world of aviation.
Before you get ahead of yourself, take that TIF. Doesn't matter what type of aircraft, the smaller the better. Why? because it's not at all like flying in a commercial tin can and you might not like it, although I doubt it. Your nearest airfield for that would be Aldinga. Check out Adelaide Biplanes: Adelaide Biplanes - Home. Further afield is Murray Bridge which has 2 flight schools and a beautiful and safe training area.(whilst learning it's nice to have a load of flat paddocks to land in if an emergency happens). I can recommend www.rpa.net.au as I learnt there. Talk to James Hubbard, owner and CFI. Different schools offer different aircraft and of course, different prices. Do your research in that area. I'm guessing, but, say you're a slow learner, you will get your RAA certificate for about $10000. For GA license, it will cost almost double. I might be a bit out, but these days, it ain't cheap. Make sure you understand the differences between to two categories. Taking the cheaper option (RAA) first, and converting to GA later, as and when money is available is another option open to you.
Which ever way you choose to go, enjoy, have fun, and stay safe.
Doug