living off p/t work

okay so this income tax season i have decided to look for a place for me and my son but the only real issue is i work at walmart p/t making $10 an hour (about $400-450 every other Thursday) and im very worried i won't make it on my own very long. I can't look for a new job bc there's no way I'll find another job making $10 an hour mostly bc i don't even have a high school diploma.. The only thing i can really do is transfer to another store but as of right now no other stores need a cashier at f/t.. Does anyone live off of p/t work? I don't wanna keep living with my mom anymore bc me and my son have to sleep in a room together and I'm 29 so i definitely wanna get back out on my own..