My father died and we are gonna lose the house

I am an 18 year old boy still in high school. I have asked and my mom knows I would dropout to help her with the bills, but she will not let me.  I have an older sister that is in an ASTEP college program because she has a learning disability.  My mom is struggling and has no job, because she was released along with my dad from a company they worked their whole lives in.
My dad died in mid November from stage 4 bone cancer. My family got no life insurance because his policy was through a company, which they denied the pay out.  The funds will help my mom pay bills and keep the house. It would also help my sister stay in college. I did the math we have till mid April till we start having problems with payments and bills. God bless.