there isn't an endless void
there isn't anything
you - that is, your consciousness, not the full you - is your brain. when your brain ceases to function... well, it's a lot like when a computer loses power. there is no void of blackness or whatever. you cease to process information.
this can happen without you actually dying, by the way. ever get put properly put under for surgery? you only remember the drift to unconsciousness, and then you wake up. there's no period of time in between.
death is like that, but without the waking up part