I had exactly this happen to me 6 months ago. Here's what I can tell you:
I was in shock for the first 2 weeks.
I didn't get much out of the first lawyer I tried. The second one was a bit better. The third one was fab. I think this was partly because I understood better what I was asking by the third lawyer. Yes. It was expensive but I don't regret trying a third different person.
I am capable of more than I thought possible. Yes, it's been awful, but also empowering in many ways.
I moved bedrooms and changed my bedspread. It made the space mine.
The mental load of being a single parent is weirdly much easier than trying to share the load.
Without him, I have peace and I have power.
Six months down the line I have mostly cheerful days. I feel joy coming home. I feel confident I can do this. I don't miss him and I'll never want him back. I do still feel sad about what he destroyed, and I'm devastated about the effect on the children. I'm sometimes furious. But I'm mostly doing great.