Hey Jase,
Congrats on decding to get your bike licence! Stay upright!
Not sure what state your in, but this is generally what happens in NSW (has been some time since i did mine though :P)
Pre-Learners course is a 2day affair. Day 1 is learning bike controls, mount/dismount, head checks etc and basically pushing the bikes about. Day 2 you actually get to start them and ride up to second gear, learn about cornering etc..... There is parts of theory mixed in as well. All in all, its prettty darn easy and if you fail this, maybe you should consider sticking to being a cager
Most places will have hire bikes for you to use. These can range from Dirt Bikes, CB250's through to auto scooters.....
I did mine at H.A.R.T in St. Ives... pretty awesome all in all.
Good luck if you go for them anyways :D