How do I cope and rebuild my life after ending an 11 year abusive marriage?

I am going through a divorce from a narcissistic sociopath who left me for another woman after mentally and emotionally abusing me for 11 years. I have moved to a different state and after giving up my successful business am working as a server at a restaurant. I'm coping as best as I can. Is it normal and healthy to not adapt as quickly and be as strong as I think I should be? I am astounded at his cruelty and how much he doesn't care, as well as most other people in my life. I feel like I don't exist to anyone anymore as there is no contact from anyone who I thought cared about me. My brother just said no to lending me a few hundred dollars for me to live on. I am losing faith in humanity itself.