Rodnos- Unless your bridging course is considered to be equivalent to Yr12 Maths and Physics you are wasting your time. Thats what the airlines want and unless you have it your application will go no further. There were plenty of out of work Ansett pilots who could not apply to Qantas because of the lack of the above subjects.
Follow FRQ CB's advise and do it the way that thousands of pilots in Australia have done it and you will have a more satisfying career. As you stated you are only 21 and capable of earning money through your current qualification. The pilots that go through GA to airlines have done so through persistance and hard work and have had a lot of fun on the way.