That sucks. Glad it wasn't worse. I know how bad it can get.
Decades ago, my z was up on two fork lifts (no kidding, 1 from the front, 1 from the back). We were in a door warehouse - on the wood door side of it. I know, young and stupid.
We were underneath and my buddy, who still works at the same door warehouse, was underneath the car with me, as we were welding in some floorboards.
The interior wasn't completely stripped out, and we had the dash and all the glass and door mechanisms, weatherstripping still in the car. The ratty stock seats were not there.
Interior started on fire. We scrambled to put the forklifts down evenly (we did).
All of the chemical fire extinguishers in the warehouse, except the farthest one from where we were working, were empty. The one I brought was not fully charged. We did get the fire out, and the interior was full of that dry chem powder. Every nook and cranny were filled - to include up into the areas around the edge of the roof. Dash and windshield destroyed.
A Z buddy had a parts car that I got all I needed out of (had fun getting the tan interior parts from it dyed black).
It took a lot of work to fix all that.
Sounds like your fire and mess weren't as bad! Glad to hear it!