Looking good man! Yeah this part is a PITA but once you get into it, it becomes clearer. What are you using to cut with? I used an electric cutter/grinder with a 4.5" wheel on it, although I had the car on a lift so I could easily stand under it etc. so I know being on jack stands does not make it easier!
Do yourself a favor and go get a fiberglass welding blanket too if you don't already have one, lots of sparks fly towards the interior. Also will be valuable when welding~ The carpet and insulation on the interior is where most of your fires will start because they glue the foam directly to the body. I tried to remove a bunch and was wasting more time doing that then I did welding - just weld small section, put out fire, weld small section, put out fire
Good luck!
J