I am not sure how the course is structured in AUS, but the course in the UK is very enjoyable, and you will learn an awful lot.
The great thing is, it will take you right back to basics, and start those building blocks off again. One thing a lot of people struggle to begin with is making the patter fluid with your actions when you are teaching a lesson. Take a medium level turn, you are used to just going through the motions, which have become instinctive, you look out, roll the wings with the ailerons, rudder to balance with the required back pressure to the correct attitude. If you try and do this as you would normally, you will need to talk at a million miles an hour to patter it
. Also you have to use the correct words and it is easy to talk bollocks when you have forgotten what to say
. However, it all comes with practice and experience, which is why you are there!
Another thing it will do for you is most likely widen your knowledge base, due to the fact you have to teach all subjects, which will force you into the books again. You will be asked awkward questions which will really make you think, and most likely dig yourself in and out of various holes. The course will also sharpen you hands on flying skills and airmanship.
Once you have done your test and you are teaching for real, the job is a lot of fun and it is very rewarding. It can be equally as frustrating though, mainly due to the weather. As you are from AUS, you may not suffer from weather problems depending on which part of AUS you are from, but in the UK during the winter months it can be a little annoying, but its all part of the job. I used to make use of bad weather days for keen students who would come in anyway, and we could crack on with briefings and get them done. Which worked nicely so when the good weather came you could just crack on with the flying.
Once you have finished your training, enjoy it, teaching is alot of fun.
All the best.