I can think of no better ending than life just ending. Like a pre birth state. Never was never will be .

Before you were conceived, you did not exist.
Once you die, you no longer exist.

There is no "waiting room" for those who haven't been born.
There is no "after hours lounge" for those who have died.

Know NO fear.
Any thought given to your death is wasting the life you have right now.

Sung to the tune of "May the Circle Be Unbroken":

Yes, the circle will be broken
By and by, yes, by and by.
There is no life after this life.
When we die we simply die.

If anybody tries to tell you
That you'll live after you die,
You can tell him confidently,
That's a lie, that's just a lie.

Treating this life as the only one you get will build diligence, and provide you with much more meaning and a whole lot more to live for HERE AND NOW.

Heaven is a fairy tale. The lights go out the way they were before you got here. Enjoy this life as much as you can.

Actually, I do think about sleeping and never waking up. It is a zen technique to deal with insomnia. "Tis a consummation devoutly to be wished" well perhaps not but if used properly it can help you sleep.
The afterlife seems like a very nice idea but think about this. Would anyone have flown into the twin towers on 9/11 if the concept had never existed?
Nietzche had a good idea about life and after. Imagine that when you die, something makes you have to repeat your life again. No take-backs, all exactly the same. Would that entity be an angel or a demon?
Or it could all just be the big rock candy mountain that the crow promises in "Animal farm". Like winning the lottery, its a fantasy designed to keep you docile

" I do believe in a heaven filled with angels, loved ones and a mansion in the sky,"

This is nonsense. It's the wishful thinking of Xians unable to cope with the finality of death so they create a happy fairytale of eternal existence in a magical realm of comforting thoughts and ideas that relieves them of all the things they can't handle.

"Basically, you cease to exist and don’t feel anything."

Now you're thinking realistically. You didn;t exist for billions of years before you were born. Death is just a return to that same non-existence. We start at non-existence, we're born, live, die, and return to non-existence. It's a perfect natural circle that makes perfect sense and there's no silly gods, or magical kingdoms, or supernatural crapola to confuse things.

Unless you decide to be comfortable not knowing the answer, this may haunt you for a very long time.

Don't bite on the fairy tales. THIS, right where you are, is heaven or hell, all depending on how you think, feel, and live.

After a person has been brainwashed to believe in an afterlife, it is hard to give that up. It simply takes some time and courage to admit "that is all there is."

Do we have any proof of life after death? It is almost a ridiculous question.

Here is the truth about the afterlife. There isn't one. When you die, you are dead. Your "energy" just becomes heat energy that cools and adds to the entropy of the universe while your physical remains chemically decompose. There is no heaven, there is no hell, nor is there purgatory, limbo, sheol, nirvana, asgaard, stovokor, the halls of Mandos or any of the other made up places that the dead go to. There is only oblivion.

And, maybe that's not so bad.

There is so much going on in life all the time so whether there is an afterlife is completely irrelevant. Just enjoy what you have here now because you be a long time dead.

Instead of looking at it from a theological/spiritual viewpoint do some anatomical research and you will find that there is no such thing as a "soul" and when the brain dies and decays that's it , there is nothing left for an afterlife.How do you think all the memories,feelings and personality are transferred from the deceased ?. On some sort of celestial memory stick, or in the latest computer jargon.Transferred to "the cloud"
Years ago when I was doing some research into this sort of thing I read a book by Steven Pinker called "How the mind works". Worth a look and it may help you on the path to reality.

Every version of an afterlife is Hell. Eventually.

Sure, Heaven could be fun for a few thousand years. A few million years into it, the more serious mental issues will probably be irrepressible. Around the first trillion years you will probably be screaming nonstop at the top of your lungs.
Eternity has barely even started.....

Why are you on site for atheist/agnostic to begin with ?

Why do you believe in a heaven filled with angels, loved ones and a mansion in the sky? Upon what evidence do you base that belief? Are you confusing belief with a wish you have?

Sooner or later, you will learn nothing about your death.

You'll find out when you get there , or not . We all die , eventually , but very few , "come back ." I did have a neighbor who was pronounced dead , while in hospital , but was recessitated . He saw the light and said he does not fear death . For many , dealing with incurable diseases , and constant pain , death is a promise of relief . These bodies have a kind of expiration date . The longer we live , the more the bodies wear out .

No one knows

There's nothing wrong with just not knowing.
In fact, it's the only rational way to think about it, because it's TRUE.
Stop changing your mind based on what you think makes you feel better about the subject... You Don't Know. You never will.

And there is a problem with death being the end. Nothing more exciting as that other than the decomposition of the soft tissue and returning of nutrients to the soil to be re-uptaked by other plants. Thus keeping the cycle going.

What objective evidence do you have for either heaven or hell?

Various groups have various ideologies about the afterlife...I figure ..'if' there is one, we all go to the same place... and we will never know what it is until we get there ... so being stressed about it .. forget about it and enjoy this ride now...