I don’t know what to do

My husband doesn’t even know I’m thinking of leaving. I just can’t do it anymore. He does the bare minimum for us. We’re still living with his parents after two kids and being married 4 years. He never helps me with the kids. At this point I just feel like we’re roommates. I want to leave so bad. But I have no car, no job, no money. I kinda have a plan and I have my sister that would help me. But I’m scared to leave with just leave with nothing. And what always makes me talk my self out of it is when I think about having to go days without my babies. I don’t know if I could do it. I’m just not happy. I want more for me and my kids. We have a 1 year old and 4 year old we live in a single wide trailer with his mom and dad.two bedroom. My and him and our two kids share the worlds tiniest room. It’s SO CLUTTERED throughout the whole house and I hate it. His mom never helps with the dishes. I always pick up after my self and my kids, no one else here pics up after their self, I try to keep up with the dishes the best I can because I care about the environment my kids live in, but sometimes they get piled up so bad and it’s me stuck to do them. I want my kids to have their own room, a clean home, I want to be happy for them. There’s so much more to the story but I’d be typing for days. Advice?