your body isn't who you are, it's just a host for your mind where the important stuff happens

but of course you have to keep it healthy otherwise you die

and btw your cells die all the time and new cells replace it. after some time you're not even the same body anymore

when you die the neural net in your brain collapses and the vast majority of the data is lost forever unless there's some future technology that'll be able to download it. so forget about being resurrected