Sorry to hear this, and I hope you are OK and coping as well as you can. There are support networks available if you are not, and don't be too scared to admit it.
Do you have any idea what it is that she wants to get out of it? I would note down all that she is claiming that she is due. Don't claim anything for yourself, yet. Her immediacy in claims of what she is due before any formal process could, with the right judge, come across as premeditated. Any arguments in which she says "Ill take you to the cleaners" or similar, record them. Don't tell her what you want, certainly don't say what she can have, but have a clear idea of what your red lines are. What are you ready to fight tooth and nail for?
The truth is, only you will figure this out, and you will. The worst days are yet to come, but the best ones will follow.
My friend was divorced recently after about 12 years. He thought everything was over, he admitted some pretty dark thoughts. His life is better now that it ever was. He's met a new life partner, he's sorted an acceptable and fair agreement with his ex-wife and the 3 kids. He's in a really good place.
It may be difficult to see now, but the future is bright, and it is for the VAST majority of divorced Men. You've got this. Go well.