Did anyone here make direct experience to try and see what is the afterlife ?

I have made research but let’s be honest, NDEs are technically not reliable since they contradict on a lot of points, I don’t know if the DMT realm is credible but I think it also changes from person to person (although the elves seem to be a common feature for most people).

So I was wondering if anyone did any experience or knows what the afterlife is like, genuinely, not from books or people telling them but from whatever they did, for example lucid dreaming or astral projection or whatever. I am genuinely curious to try and see what is the closest we can get to knowing the afterlife.

For instance I do wonder if high ranking secret societies actually show direct experiences to their initiates to make them know instead of believing. I know a lot of people here are curious because theories are ranging all the way from school of souls to prison planet.