Career in tech theatre-- looking for advice

Hi-- I'm probably a very late bloomer; I've considerably less under my belt than the average university student who dabbles in technical theatre. So far I have stage managed for 3 semi-professional/amateur shows in all (done crewing for one or two more), one for which I also tried my hand at set and publicity design. Trying to get as much experience as possible, hopefully I might be able to figure out if i'm really any good at this thing (always had an interest in it, but whether it's right for me is something else altogether), although there's always the slight chicken-and-egg situation because of my late start. Was just wondering if anyone could give advice on what institutions/courses in the Sydney city area would be useful for an aspiring techie, and what courses you would recommend for someone who would perhaps be interested in all aspects-- both stage managing and set design. Also, things like the level of competitiveness out there, what to look out for, etc. Thanks!