I'm currently looking into getting custody of children for my younger sibling when I turn eighteen this December. Right now my twelve-year-old sister is living with my mother and stepfather, both have previously been abusive towards my older sister, myself and my younger sister. My older sister who is twenty-one wants nothing to do with our parents and now I'm left to help my sister as no one else will. My younger sister is currently suffering from mental health issues that are not being addressed by my mother as she believes that it's not important. Because of the abuse from my parents, I had to leave home and live in homeless youth housing because my mother said she was unable to cope with my mental health issues. I'm very concerned that it will be too late for my younger sister if this happens to her when she is legally allowed to leave home . I'm currently living with my partner and studying child protection online and back off my feet again. Child protection agencies have been involved for years but we have constantly been swept under the rug. I have cared for my younger sister previously when my parents have been absent. About six months ago, my younger sister had an assessment with the independent children's lawyer or ICL and I discussed with him the issues. He suggested that I seek custody of her in December, I just don't know how to go about it. I would also like to access the ten or so years of family court orders from my father and mother regarding my siblings and I to help my case. How would I go about this? Will I be charged a fee for the documents? Thank you for any help and I apologise if it's confusing, I have been trying to get my head around it for more than ten years.