Hey, guys! I finally joined the club

Huge thanks to EastCoastCB for pointing me in the direction of this fantastic lil shorty and answering all my questions! You rock! I flew from WA to CO and drove this baby home in record time, no issues whatsoever!
Here she is
Got home yesterday and already made some decent progress!
So is the general consensus here that I should definitely remove the floor? I took out the middle aisle strip and I'm unsure if I should rip it all out. I'm 6'6" and would like to not raise the floor, which leaves replacing the 3/4 inch plywood with something or putting something very thin over the current plywood/vinyl.
Also, are you guys insulating the walls and ceiling? I'm unsure whether this is necessary or if I can just paint over the walls. I live in WA but I'll be all over the map with this, I plan on a small wood burning stove for the cold nights.
Thanks for all the help everyone

this is a wonderful community!
I will be updating this thread and video documenting my entire build. Be on the lookout for my videos! Cheers!