I turn 20 in two months, and I still don't have a proper job.
What job would you want if you had one?
I want to become a social worker or a doctor.
It's good that you have aspirations for what you want to do, but you really should find a job to support yourself. Even if it's a job you don't want, just having any job to work while you work toward your dream job is good. It will allow you to pay your own bills and treat yourself sometimes.
I don't want to waste my day making minimum wage.
I understand making minimum wage can be discouraging but everyone has to start somewhere. If you haven't finished school, that should be your priority, then after that you can start to look for a professional job with your earned qualifications.