(just saying im a muslim do im giving u the islam explanation)
When you go to the grave, two angels will come and ask you 3 questions which will test your faith. If u answer correctly, ur time in the grave is comfortable. If u answer incorrectly, it will be the opposite(if u want details just ask). Many signs will signal the end of the Earth, and one day, one of the angels will blow a horn and all living creatures on Earth die. Some 10k years later(you better answer those grave questions correctly!), the horn is blown again, we come back to life, and ascend to wherever the day of judgement will take place. Over there, the sun will be a mile away from the ground, but some will be under the shade of God's throne. Once it starts, each person will recieve their deeds in a book(if u get in ur right hand, then u good. If in ur left, well...hope you like hell) and will be questioned on everything individually(unnecessary side note: everyone will be naked and 33 y/o unless u died before that age). Then we will be asked to cross a bridge: under it is hell, and on the other side is heaven. Some will travel at the speed of light; some at 100mph; some at the pace of a snail. If you got ur book in ur left hand, u probably gunna fall.
and yeah, ik this is a complex explanation, but its the simplest
