Advice?

So my step dad lost his job as a doctor today because of his drug addiction that's his 3rd time getting caught. And my mom just told me she is not willing to work. How am I supposed to take care and provide for my family? I have no transportation. Also my little brother is terminally ill with neurofibromatosis and a tumor encasing his aorta. As much as it sucks that he lost his job I'm happy because now people are not putting there life into a guys hands who clearly is wacked out on drugs.