Well good luck, hope you don't find as much rust as i did .
Would i do it the same way again, well now I've watched lots of videos by "yorkshire car restoration" i think i would do a few things a bit different. note: yorkshire are working with older cars that generally have thicker metal than the connect!
https://www.youtube.com/@yorkshirecarrestorationif working outside. There is also pressure on you to get it done quickly and the frustrating thing is: wind, rain and cold, daylight..which will all stop you ..you cannot weld even in a light breeze, it blows the shielding gas off the weld, resulting in a bad weld. so you need wind breaks even on a calm day.
Being cramped underneath in a small space prevents good dexterity.
There will problems seeing weld through mask due to you being in the dark and looking towards outside which is light...strongly recommend powerful lights pointing at the weld, that's if you can find space for them.
Note weight of engine ...it's cantilevered past jacking points..so important to support van , so that when you take metal out , engine weight does not distort panels.
Time.Remember this - Everything takes a long time, if it doesn't , you are not doing it right. don't expect things to magically happen .. you need a lot of Patience - look at the time of this thread from first post to last post when im pouring paint into the sills ..that time span was for
1 side . maybe 15 -20 hours each week, which is all the weather would give me..some of it thinking ..some of it doing. Note, there were a lot of other jobs done at the same time, some not shown.
Like sand blasting inner rear wheel archers, blasting and painting spare wheel mechanism, rear cross member was blasted, underside where the spare wheel fits, bracketry that was there for anti roll bar ..the whole area was blasted ..i cleaned and treated the rear liners with solvent based "water seal"
FIRST JOBStrongly recommend that you take the wheel arch liners out, you then paint on degreaser, power wash the underside to get off all grease/ oily residues, muck and dirt .out of box sections / all surfaces.so that when you finish the job and paint and waxoyl ...its dry and ready to paint and not impeding you.
all the best.mark