Pit bull help 😭

Karen

So I’m moving soon and renting a house however a lot of the homes I looked at only allow small dogs or have breed restrictions and I don’t want to have to give my pup away. She’s the sweetest most lovable dog you could ever meet. I want to make her my emotional support animal because she brings me comfort and has helped me with my anxiety so giving her away is absolutely not an option for me. However I don’t really know the necessary steps to take in order to make her my ESA. Do any of you have an ESA and how were you able to do that ? Thanks !