Ugh. Before I got ‘biek’, I remember having to change a tube on a Dutch bike (coaster brake, kick stand, chainguard) and it seemed like the entire back of the bloody thing had to be taken apart to do that one small operation.
Learned a lot that day.
I think you don't change the tube, you pull it out, patch it and shove it back in, then replace it at home or get a bike mechanic to do it at a more convenient time, eg about twenty years after the original puncture when the tube is more patch than rubber.
visit from the fairy this morning in the pitch black, mudguards etc, what a faff!