How to tell husband about divorce

I already left. I told him 95% im divorcing him. After leaving it has moved to 100% and I've started checking things off a list

✔ Housing situation

✔ Got a job

✔ New Bank account

🔲 first paycheck

🔲 appointment with lawyer to talk about options (im hoping to do this without a lawyer but was generally advice as to options)

Im hoping to get a legal annulment to eliminate the possibility of me paying his student loans (shared property state), but that means I would have to air his dirty laundry that proves my marriage was coerced and fraudulent. His dirty laundry is something that COULD potentially ruin him and im worried about that.

I feel horrible telling him its final because he is living in the hope that 5% becomes 100% and I dont think he's properly preparing himself for the fact that im not coming back. Im worried he will blow up on me.

What do I do? How do I break the news?

Thanks all, we don't have kids together and I don't WANT to air his dirty laundry, it would only happen if it was the only option for a clean break.

In my state there isn't a limitation on annulment (that I have found) and I do have concrete proof of him admitting over text that he married me withholding information that he knew meant I would leave. That he purposefully did so in order to make me stay in ignorance.

Since I don't know who this man is once his secrets were revealed, I have no idea what will happen in a divorce. Yes many of the loans he took out while we were married... while I was the sole provider.