Nobody knows. Some think you go to heaven or hell (or their religions version), some think you get reincarnated, some think nothing happens at all. There are people who believe they have the answers but seriously, nobody knows.
No human knows. I personally believe that you live on in the hearts and minds of others as memories. Others believe that there is a Heaven for good people and a Hell for bad people. There are other ideas also. Your guess, no matter what other people tell you, is just as good as anyone else's! Go with what your heart tells you because your brain certainly doesn't know!
Scripture says that the body goes back to dust again, and the spirit goes back to God, from whence it came. After the spirit goes back to God we have examples in the Bible of the spirit going to a "resting place" to await the end of time, the Judgement Day.
When we die our bodies eventually turn back into dust.-Genesis 3:19.There is no work nor devising nor knowledge nor wisdom in Sheol.- Ecclesiastes 9:10. Death is the opposite of life. When we die we don't see or hear or think. Not even one part of us survives the death of the body because we don't have an immortal soul or spirit. Life is like the flame of a candle. When the flame is put out, it doesn't go anywhere. It's just gone.