I am sorry that you're hurting right now. This isn't a walk in the park for sure! Glad to hear that you spoke with your lawyer.
As for spousal and child support, I'm going to let Ellie, Job and others with experience to chime in with suggestions as it is way out of my realm of experience.
First things first, you need to find a way to get yourself centered and grounded to calm down. Take a long walk out in nature. Mother Nature's job is to restore your down spirits and uplift it.
You may want to respond in this way:
"I am willing to meet with you to hear you out and listen to what you have to say. Let's be clear on one thing: you did initiate this whole process and need to take responsibility for it. Please give me some dates and times. Thank you, WR"
