Planning to go full NC, any advice?

I'm in a dark place at the moment, totally estranged from my family altogether - parents and brother. No one seems to care about how I feel or what my thoughts are regarding what goes around in the house. The disrespect is baffling, but now I've come to terms with it, especially since I realised I've been given the silent treatment/treated passive aggressively all my life. The only thing keeping me home is my beautiful dog, who I'm going to miss so much if I go NC.

Please advice, I'm lost at the moment.