First, good for you for getting out of a physically abusive relationship and for putting him in jail. That's a hard thing to do and you did it (I've heard that many people have a hard time leaving their abuser, so good for you). Second, I'm sorry you've been through all you've been through.

losing one's home and car, I can only imagine that as a painful experience and transition. I'm sorry you lost your mother.

Are there any support groups at your shelter? And is there any social worker there to point you in the direction of a good low cost counselor? Counseling could help you.
Other than what I suggested, there's a lot you could do to cope. I don't want to seem trite or flippant at all, bc you've been through a lot. But do you like nature? How about walking? Art? Music? Writing? Reading? What are you drawn to? Enjoyable activities, even one a day, can lift spirits.
In terms of the grief you're feeling over your mother, I hope someone else has some good suggestions. I'm not sure myself, but sometimes when I want to know something, I Google the question I'm wondering. For instance "how to grieve when you've lost someone."
You're in my thoughts. Sending you lots of supportive hugs, Xonyx.