Hi Sam,
Welcome to the OCF forum from another Aussie who is also in NSW. I saw you register and was wondering when you might post. I am so sorry to hear about your brother especially with 4 young children. In which state does your brother live? We have people here from all over Australia.
My treatment was very different to his however there are so many knowledgably people here who will be familiar with his situation and able to help with your queries.
It appears you are off to a flying start already with your research and questions in your posts that I have read so far.
It is understandable that your brother is anxious and with time he may be more inclined to join when he realises what invaluable information there is to be found here.
Gabriele