Ours is pretty simple - we believe that most people, no matter who they are or how old they are or what religion they are, are just asleep when they die. Not actually asleep but in the sense that they're not conscious of anything, not doing anything, not haunting anyone. Then after Armaggeddon, they will all gradually be resurrected.

A few decades ago, it was thought that babies who died before taking a breath would not get a resurrection. This was updated a few years ago as it became obvious that Jehovah considers life as beginning from conception, as noted in the Bible. So just because we don't quite know HOW unborn babies will be resurrected, doesn't mean they won't. It's something that gave me so much comfort after my own miscarriages.

We also believe that since Jesus died, Jehovah has chosen 144,000 people (also shown in the Bible) that are to 'serve as kings and priests with Jesus in heaven'. So when they die, they go to heaven, but the rest of us are just 'asleep'