You will need to get a job and then leave before she takes all your money. That is YOUR money, not hers. If getting a job is hard for you because you have too little education, you might need to take some vocational courses at a local 2 yr. college and start a career. Job interviews are easier when you are well qualified for the job.
Get a job, then get free, and, above all, have a plan but don't tell her, or anyone who knows her, about your plan. Move out while she's gone somewhere visiting or shopping. Leave a note that tells her politely that you are gone and will not be back. Give her a contact# but no street address, just a mailing address. If you stay away from her, you will start to heal and become stronger gradually as you start to accomplish building a good adult life. Believe in yourself. You've survived this witchy mother, you can survive a lot and even thrive in your new life. Social skills can be learned, then practiced. Your problems are minor--except for HER. So get out before she does you some real incurable harm. If you actually fear for your life, there is every chance you are in real danger.
I had a mother from Hell. I still suffer from some really bad memories. I, too, had to escape from her and I, too, feared for my life for realistic reasons. But I'm old now and never thought I'd get there. My mother actually did try to murder me once at a family friend's house--but her friend was brave enough to stop her.
For more details about my mother, please read my Featured story under my Profile here.
I will be glad to provide support here anytime you message me. I check my messages at least twice a week, usually more often.
I admire you for having the guts to reach out here and try and find a way out. I wish you the best.
One more thing: If she hits you or physically attacks you in any way, call the police and report it. And if she calls the police on you, call an attorney.
One way to get the police and other people to believe you would be to record (on video or audio) one of her temper tantrums or threats to you. Her behavior is not legitimate and might not even be legal.