Don’t forget the part where you buy all of the extremely hazardous acid before the apocalypse.
And then remember to do the wiring of your shelter before you breath in all the acid and lead fumes.
Get the order wrong there and you’re just gonna burn all your tanks of acid.
Hydrogen is very difficult to bottle. It tends to just slip out of anything you put it in because of how small the atoms are.
And also incredibly low density. So your bottle would likely be on a trailer.