Moving outta home helppp?

i wanna move out of home. i dont wanna be here. if lived with friends before. and that went fine. i just wanna get my own house. but im 15. i know thats a young age but i have been through so much. im alot mor mature. i need help on places i can go. keep in mind i live in adelaide. what do i do. how do i get my own house?