Also beware of the scam of a school taking you on for the instructors course, when they do not have an instructor who can recommend you to CASA for testing. That requires a separate authorisation above a Grade 1 with 500 hours instructing, and is not that common.
What some schools have been reported as doing is giving you 38 hours then hawking you round to another school's examiner - who may be unwilling to accept you as he only has your file to go on.
Ask around - in several states - before putting your hard earned dosh down. The two mentioned here are reputable, and I did mine recently with Aerowasp when they were at Illawara.