I am very sorry for your loss.
Get a legal pad and start a list of things that you can remember.
My father lost his woodworking shop to fire seven years ago. We are still recalling items we forgot to replace while the insurance company was on the hook. He has a better building and new tools now, but the memorabilia, decoys, things he made, things people made for him, and the good old fashioned quality tools were impossible to replace.