So you wanted work and your mum wanted you to turn down the job offer because she didn't like the company's products, and she hit you. First of all I think that your mum was wrong to hit you, instead she should of consulted with you, and second of all I think moving out of the house would be a bad idea because living independently will be hard and I'm sure your mum didn't mean to do it. Some parents deal with certain situations with being aggressive, but that ain't the right. I think you should talk to her and tell her that you feel scared and you do not want to her to be aggressive towards you.