As you say above, you have difficult days ahead. I wouldn't go making a lot more announcements to him about what you are doing. It will just provoke bad behavior from him.

Make sure your paychecks go into an account that's in your name only. See an attorney about protecting yourself financially. Your husband may try applying for credit that you could end up financially responsible for. He may try to get a line of credit based on home equity. He could end up spending the home equity before you even figure out what you'll do with the house. See a lawyer, and don't even mention to your husband that you have spoken to a lawyer. Your husband is clever and manipulative. You need an attorney to explain to you what rights your husband has. Your husband will be strategizing how to use his rights to manipulate things in his favor. He will certainly look to drain out what marital assets he can plunder. Get rid of any joint credit cards.

A part of your heart is going to hope that the divorce announcement shows him you're serious and will shake him up into wanting to change and act better. You'll go back and forth on that. That's okay. Just go get legal advice on how to protect yourself from what financial stunts he might pull.

Avoid getting into verbal back and forths with your husband. Go about things quietly. If he sees you seriously pursuing separation/divorce he is going to get really angry. He has the potential to become dangerous. That could get directed at himself, or at you. He is a manipulator. Avoid drama. You may want to pour out your heart to him. Don't.