break problem

this was my first time trying to change the rear drum
break shoes on my 92 Nissan Stanza. it could be a quick
job if i did not ignore one import advice on my repair
manual which says:

never depress the break pedal while the break drum is removed.

i depressed the pedal before putting back the drums.

my ignorance was immediately punished as the pedal became un-pressible. it does not move even after i managed to install
back the drums. and i cannot start up the engine.

i left the car there for one day and tried to jump start the car this morning because somehow the battery ran out although i just tried to
start the car twice. looks like something is using the battery
while the engine is off.

i was able to press the pedal down but it was very firm and even a jump-start did not work! i don't hear any motor rotation. what was wrong?

Your advice is highly appreciated.

Jack

I was gonna say try bleeding the break lines, but you can't even push the pedal down?? I was in an Auto class and we worked on drum brakes before, but we did not compress them. I thought if you start the engine up, it depresses. Try to start that motor