Getting Started

I'm 24 years of age, and I still live at home. I'm trying to save for a car, but it's been really hard. I work part-time at a retail store, and go to school part-time also. I don't have any credit, so I now realize that it's gonna be hard getting a car, or anything else until I build some credit. I've been trying to put twenty dollars away here and there when I can, but recently my hours have been cut since where I work the winter months are kind of slow. On another note, I've also been trying to help a family member, and the little I did have saved towards my car has dwindled alot. What do I do? I feel overwhelmed.I'm sorry for the long post.