RedL

I am in the earliest stages of thinking about a move to Australia. At this stage I would like to know if it is actually even possible. Any help would be much appreciated. My family circumstances are very complicated. I am a 24 year old female, my mother and father have both died. As a consequence I am the legal guardian for my 16 year old brother. However, I also have another brother for whom I have power of attorney as he is severely autistic. He is entirely dependent on me. Where do I stand in terms of visas? If I can get one, which I've been told I can, are they entitled to just come along too? Or is that totally naive? By the time we might move I think my younger brother will probably be 18 too. He is also autistic and dependent though, so I am assuming his case will be similar to my elder brother? So, I guess my question is how do visas work if you want to bring a dependent adult rather than child? Equally, is there any problem getting a visa for disabled people? Thanks in anticipation of any help or advice