Looking for a dog (Kindred)

I am looking for a pitbull or another loving protective pet.
I have PTSD, anxiety and depression.
I'm looking for a pitbull for my emotional support animal.
I am disability because of my mental health and a dog will really help as my emotional support animal.
I live alone, I like to walk but not alone.
Thank you for reading this and I greatly appreciate you for helping me.