So sorry you are here. Im 4.5 months in and just had the D convo and looks like my H has started papers.
As a mum to two kids and having experienced what you have, i would say concentrate on your kids and you. Take time to have a relationship with them. Mine has become amazing over this period of time.
Its tough, keep busy, but if you have someone to help With the kids accept the help. I dont and there were days at the beginning where i could have really done With support, so i could be at home on my own For a bit.