My divorce was the most difficult period of my life and I had initiated it.
This event is so sudden and unexpected for you it will be ricocheting around your brain like an exploded bomb.
I don’t think there is much you can do until your brain and body have had time to process it. You have to make the transition from happily married to separated in your mind and this unfortunately will take time, just like bereavement.
All you can do is survive during this period of horrible adjustment.
Do whatever you can to help yourself. Distraction and talking to family, friends and professionals. Find any support group you can. Be kind to yourself and don’t beat yourself up for not being able to deal with this ‘properly’ at the moment.
Other posters have signposted the practical things you need to start thinking about.
I have found the analogy used in bereavement about the big ball in the box useful.
At first the ball is as big as the box and it keeps hitting the edges of the box all the time (that’s your pain). As time goes on, the ball gets smaller and so hits the edges less often.
There were many, many unfair things in my marriage and divorce (they just reinforced to me who my ex husband really was). But now I’m divorced, there’s nothing I can do about it. I’m trying really hard to let those feelings go.
I send you every sympathy- it’s such a hard time. But there will come a day when you look back and realise how incredibly strong you were.