Well done on making the decision to get out OP. No one here underestimates how hard that must have been.
He sounds like a very vengeful and angry man so you need to plan things carefully.
Today you should take a bag with your most precious and valued possessions and leave at at a friends / your mothers house ( assuming you can do this without him noticing, most of these things are quite small ).
Take
legal documents like your passport , birth certificate , graduation certificate, insurance, driving license etc
sentimental things like photos or jewellery
spare house and car keys if you can ( in case he takes yours )
make sure all your photos etc are backed up to the cloud and that he doesn’t have ( and can’t guess ) any of your passwords
Keep any work keys / ID / bank cards close to you but hidden so he can’t take them.
The next time you go out, take a few more things if you can, so you have a basic set of clothing at a friends house ( this is all assuming they have space,
perhaps under a bed in a spare room or a box in their loft ).
Perhaps you can do some cleaning and pretend to your husband that you are clearing out your wardrobe of old clothes and taking things to the charity shop in black bags etc .
Do NOT take things in a suit case and tell him you are leaving or thinking of leaving. I know it’s tempting to “ talk back “ to him and let him see how angry you are, but you need to think carefully if that’s the safest way to handle him.
Please consider carefully if you need to go along with him ( not arguing or challenging him ) until you can get Legal and other advice and make a safe escape plan.
You can always go grey rock. So still sleep in the other bedroom and just say all the time “ I don’t know / I’m tired / perhaps you are right / I’ll think about it “.
You know him best and how not to make him more angry. Because this is about you keeping safe and getting out without you being harmed. There will be plenty time later to give him a piece of your mind, let him know how much he had hurt you and how appalling his behaviour is.
This is the place to vent ( or with safe family and friends ) and home is the place to act.