I wouldn't claim being Christian because far too many evil people claim the title. I am a follower of Christ and do believe in God as our most high supreme creator. I'll never fully understand everything because it's far beyond our limit of understanding. I have been studying biblical and apocryphal scripture for roughly 15 years now so my beliefs are strong. I force them on no one and will never engage in arguments with non-believers. Everyone has their own beliefs and I understand that. Everything was created by someone (or something), our clothes, our vehicles, our computers, phones, etc. I certainly don't believe some random planets smashed together and suddenly all of this came from total cosmic destruction. There's too much fine detail.
With that being said I will share my opinion on what happens after we die. Physically, our life is over, our brain (where the majority of our suffering exists) is completely shut down and expired. We, as in who we are individually, have been aquitted of everything. Every responsibility, every thought, our entire existence. It's over. We experience and are aware of nothing. Similar to being under anesthesia, or being deatly tired and having a night of dreamless sleep. Except it lasts forever.
Spiritually, meaning our soul, which we have zero knowledge of, leaves us. We have no idea what it does, where it goes, if it's recycled, if it expires as well. Similar to when we were born, we knew and remembered nothing, and still, at this point in our lives have zero knowledge of anything that was going on prior to birth. It will be the same after death.
I do not believe in life after death, I don't believe in hell or purgatory or any of the Catholic nonsense that was made up during the 1st council of Nicea for monetary gain. And tbh I don't believe in about 70% of today's modern day bibles. It's all been heavily edited by those in power. Fear tactics used for control, obedience and tithing.
Depending on our method of exit we may not experience peace for 20, 30min, maybe an hour or so. But once the task is complete. It's over for the person we once were.
Edit: And there's no such thing as unforgivable sins. Death is death. Whether we go naturally or early we're all going to the same places. The oven or the ground. Don't let anyone ever scare you into thinking you will suffer or be burning in hellfire and eternal damnation. It's all lies and manipulative tools used by "religious leaders" and modern day churches who claim to be the liaisons between us and God.
