My idea of Heaven would be, that it’d be a place where you get to spend as long as you want there before deciding to move on. Like whether you want to comeback as someone new or want to be an angel or want to do something on a cosmic or spiritual scale that contributes to the bigger picture. You’re free from all suffering, regret, torment and guilt.
The idea of Hell is, is you get planted into two potential places aside from the commonly registered idea of hell that’s depicted. One place is solitary confinement, for your spirit. No contact, nothing. Whatever you suffered with, still remains and nothing or nobody will bother with you.
Another place, is where you get to relive your better dreams and memories. But they’re going to be fucked with until they’re nightmares, robbing you of ever reliving the pleasantries that they once provided you. It’ll be like partaking in a bad sitcom and you’re its star. You’re here in this idea of hell for quite the eternity, you don’t get choice as to when you want to leave or what you do with your spirit.
First, about eternity:
Your physical body ceases to exist. Eternity remains. That means, math and physics have no meaning for you anymore.
Time will end for you. That’s the part that’s the most difficult to imagine. It is easier to think about how the first 3 dimensions have no meaning anymore, but then time will be gone as well, but you are still there.
Now heaven and hell:
Heaven is when you are forever on good terms with the God who has made you, and his whole bunch there. You will have all that you need for an excellent life there.
Hell is when you aren’t - then you remain alone with your grumpy self, or maybe with the devil who makes his life good at your expense.