Death is only the start.
After death,there is grave until resurection day.
Then there is judgement that will dur for 50 000 years.The sun will be too near that humans will be drowned by their sweat.
After judgement, eternity in Paradise or in Hell.
For those who did big sins and was believer to Allah and his prophets Adam,Noh,Abraham, Issa-Jésus,Mohamed peace be upon them they will go to hell for purification then Allah will send them to Paradise for eternity.All babies who died before grown up go in Paradise without judgement.
The Prophet Mohamed peace be upon him said: "We will come out of Hell-fire he who has in his heart the weight of an atom of faith".