HOW to start from zero…

I don't know how anyone ever fully rebuilds themselves from being a family scapegoat...
Because it affects your self-esteem to the worst possible level... And the only way to heal is to basically walk away from all the people you've ever know, whilst simultaneously knowing that they're all sitting around talking bad about you and you have to go out in the world and you have to find people that treat you better and value you, all while you're so broken from decades of psychological abuse that you don't even know if you're worth being valued by others... so it's hard for you to put yourself out there and interact with others, because you're just beaten down by life.
This past year is when I began to wake up to what I have rationalized and avoid looking at for decades… And that is that not only am I my family scapegoat, but it is truly to a severe level. Which that was already hard enough to begin to face. But now I am at the true threshold of walking away from everything I’ve ever known… and even if it’s truly pure abuse (the family i had), it’s sad to admit that it was better than being completely alone. Because essentially, I don’t even have a spouse, so I am charting a new stage of life where I’m supposed to make new connection/bonds, yet I’m working with a nervous system that is afraid to trust again, and one that’s also not fully sure that I’m not everything that they say?!?
So for all those that have been fully pass this stage of it, please share any/all advice because I’m brokenhearted and I’m terrified…