How do you take on family responsibilities at young age ?

I'm at stage in my life where I feel like not only do I have to be responsible for my life but also my family too. My mom works a regular job in fast food due to English not being first language. It is difficult to find jobs for her. She only earning minimum wage income. Brother is disabled and dad passed away. I'm already in my mid20s. Im still trying to figure myself out and the more I overthink about my family situation and life and how everything is going, I immediately feel so overwhelmed and defeated by life. My answer and fear to fade the real world has increased. I know I have to become the bread winner in my family and come out of this poverty line. Working retail and fast food jobs isn't going to cut it in this day and age where everything is expensive from food to bills and rent.

But part of being an adult is also taking care of life duties whether it's knowing how to do basic auto repairs, communication and problem-solving, taxes, understanding how insurance works and definitely ways to save money. At unprecedented events I just totally get blank as I just don't understand what to do. And nobody really talks about this stuff in real life. Like how do you invest money or what to do if someone falls sick and is hospitalized. What to do if you get in car accident. How do you protect your documents in case of emergency. Like adulting is so complicated