If anyone tells you that they know for sure what happens. don't listen to them. None of us really know for sure and the only ones that do know are far out of reach and we can't exactly just ring them up and ask them how it's going on the other side.
With that said, I personally believe that the afterlife is a vast, vast, incomprehensibly vast place and that there's no single afterlife that everyone goes to after their death. I think that your afterlife will be heavily tailored to what your beliefs are as well as what kind of life you lived. Whether this be reincarnation, a blissful place of peace and healing, or just exploring the universe and infinite cosmos, everyone will go somewhere that fits with their desires and how they lived their life. For me, I have a feeling that I'll probably just live another life in a world similar to ours but with some adjustments, some good and some bad. Maybe it's just wishful thinking, but I think that my death will only be the beginning and that my true life will began somewhere on the other side after this body stops functioning and my life here ends. I don't think I'll find peace though, at least not after much more suffering and learning.
That's just for me though, everyone has their own personal beliefs about where they'll go after death and i'm sure that if there's another life after this one, most will get the peace and happiness that they were never able to get in this life. I just don't think that i'm one of those.
One thing that disgusts me about a large chunk of the kind of people that discuss the afterlife, NDE's, etc is the stigma they have towards the suicidal. They always say something along the lines of, "you'll just have to reincarnate again to learn the same lessons you were supposed to learn in this life if you kill yourself", as if that makes any kind of logical sense. What kind of universe with any semblance of mercy and caring would put a soul into a world as cruel as this one, have it suffer and suffer to the point of wanting to die, wait for it to kill itself, then put it into through the same life for more rounds of punishment, as if the outcome will be any different. No, I believe that if there is anything waiting for us after the lights go out on this side, those who commit suicide will be met with love and caring and given the healing they need if they want it and choose to accept it. Anyways, rambling over. Those are my thoughts about what'll happen on the other side but take this with a truckload of salt. I'm just one person and the things I said are pretty heavily influenced by my own personal biases and beliefs.