Get a job, whatever the job is about.
After getting the job, start to help with small things in the house, like buying food, cleaning the house, helping them.
Slowly but surely they will like the idea of having you working and helping. They will change their mind eventually.
While you still living with them, try to open a bank account, savings and checking.
Start slowly, save some money, work, help your family.
You are like a bird who will be ready to fly very soon. But don't try to leave the nest so soon, because you can't fly yet.
It will take you months, but with good effort you will make it.