I don't know what to do anymore

I don't have a job, my family is verbally abusive mainly my grandpa. I'm pretty sure they wouldn't care if I was gone and never heard from me again. I'm kinda just considering killing myself. If not just save money buy a plane ticket to any city I like and just never turning back. I have no help at all here or support. I've told my grandma that I've tried killing myself. She just called my crazy and said that there's something wrong in my head if I tried to do that. Not once has she asked me how I've been doing or even check in with me since. I know how to drive but they don't let me use the cars to go to and from work. My mother lives around the block and doesn't call me or message me. Doesn't want a relationship with me at all. I don't know what to do anymore.