I think you've got the right mindset and a heck of a work ethic that surely someone would give you a chance to get a foot in. We're screaming to employ someone like you in Aus. Sounds Like u know a bit about cctv. Google boschsecurity in your region and there's online training regarding everything from cameras, network principles, dvrs. You can get certificates for your training and it will actually help with an understanding of how cctv works. From cameras, networking, dvrs, storage etc. Just be willing to run cables and fit off cameras for a bit. I reckon it's a good idea but 5 years is pretty tough. Enjoy the experience. Hope that helps.
Best of luck mate!