So sorry to hear that.
The same thing happened to us in March, a battery that was charging caught fire, and while the fire wasn't too serious, the smoke damage meant that everything was beyond repair.
Our insurance company has been amazing, making sure firstly that we had somewhere to live (hotel for a month, now in a rental) and arranging for the various trades to come in and fix everything. Everything has been cleaned and redecorated and no longer smells. We're going out today to tell the carpet fitters that their quote has been approved, and next week we're going to start ordering some beds, mattresses, etc.
Once that arrives we're going to move back in and start replacing everything else.
If you haven't already get in touch with your insurance and let them deal with it. And everyone has said the same thing to us - thank God everyone is safe. It's true and I'm grateful for that, and possessions can be replaced. It hurts that some things have been lost forever, but actually those were the things that we never really used, or even looked at.
I still feel anxious, but I know that when we do move back in it will be to a house which has been redecorated, with safer electrics (we're paying for that ourselves), with new furniture which is more appropriate for our kids ages and without a lot of the clutter that we had accumulated in the 10 years of being here.