I'm sorry you've had to find us. Life will get better - not quickly, but if you start resolving the issues you face and knock them off one by one, you will survive and thrive.
You are the only one who can decide how much info is enough.
I sought as much info as I could get. I thought I was using the info to gain some understanding of my W's A, and that would be, or get me, something of value. I was wrong. The info didn't help, but the process of Q & A did.
My W's answers were valuable because
every honest answer helped rebuild trust (dishonest answers would have done the opposite, but she stayed truthful).
Every honest answer helped her take responsibility for her actions.
Every answer increased our communication.
Every question I asked aimed at finding a deal breaker, and I wanted to R. The fact that W revealed no deal breakers helped seal my decision to R. (I like to think I'd have split if she didn't meet my requirements.)
I used to have a much longer list, but I can't remember it now. It all boils down to honesty for me anyhow. One of my requirements for R was 'no more lies,' and the Q & A was an opportunity for my W to show me should would or wouldn't comply.
Bottom line: my reco is to ask as many questions as you need to ask.
*****
I understand that paying for sex is worse than an affair to you. That's OK. You may be right. Both seem equally abhorrent to me.
But I, too, assert that your H's choice was about him. It says nothing about you.
And the 'walking zombie' feelings are accurate for many of us. Finding out one has been betrayed by one's partner is traumatic - but have faith in yourself to heal.
BTW, MC treats your M, and your M didn't fail. Your WS failed. Few WSes change from cheater to good partner without individual counseling(IC)/therapy.
A good IC can help your make your decisions and resolve the anger, grief, fear, shame, whatever feeling that come with being betrayed.