Although some of what is described here is very desirable for me, almost everything, how we try to imagine the afterlife and the experience of non-existence in general, is not subject to any verification and is most likely just a fiction of the imagination.
However, expressing myself more generally, I would simply wish that non-existence, whatever it may be, would turn out to be a fundamentally better and preferable state instead of life.
In other words, we can use the metaphor of a hand on a hot stove. From my point of view, the best case would be if the hot stove turned out to be life, and the state of releasing the hand would be death. In this case, everything would be approximately as in the concept of Schopenhauer's idea of the irrational nature of our tending to life in each of us, that is, life is by definition a less preferable and alien state than non-existence.
Accordingly, the worst thing for me would be if hot stove were death, and releasing the hand were life, then even releasing the hand for any even the shortest period of time would be better, and therefore any life would be preferable to its absence. This case (which is adhered to by pro-lifers, who assert the value of the life of each of us) would be terrible, since it would mean that non-existence is a much worse state, from which we tend to get rid at any cost for any insignificant period of time, from which it would follow that any painful experience of existence is preferable to non-existence, and depriving yourself of it on your own would be a cutting of the branch on which you sit.