I had a very similar home situation when I was around 18. It is very disheartning to reach out to your family for support and then be rejected. I don't think some people can comprehend what depression really is. I think it is difficult for anyone to know what it is like to not feel any happiness or joy for a time without experiencing what that is like. I don't think my family got how serious it was until i checked myself into a hospitial because I didn't feel safe. I did find help, and better ways to cope. Therapy helped me deal to with these feelings. Being around good friends also helps me. I have a hard time talking to family about this because they don't get it. I try to sorround myself with people in my life that make me feel good and not ashamed for what illnesses I have.

I really like your idea about volunteering. I think you are pretty awesome for wanting to help other people and yourself deal with this. I hope you find people to help support you.