Al-jawab billahi at-taufeeq (the answer with Allah's guidance)
Life After Death:
Under the instruction from Allah Ta'ala, Israfeel (Alayhis Salaam) will blow the trumpet. This trumpet will be in the shape of a very large horn. On the blowing of the trumpet, the earth and skies will be blown into smithereens. All the creatures will die, and those that have already died, their souls will become unconscious. But those whom Allah wishes to protect, will remain as they are. A specific period will pass in this condition.
When Allah wishes the entire universe to arise again, the trumpet will be blown a second time. By the blowing of the trumpet, the entire universe will be re-born. All the dead will be brought to life and they will all gather in the field of resurrection. In apprehension of all the difficulties of Qiyaamah, they will all go to the prophets for intercession. Eventually, our Prophet (Sallallahu Alayhi Wasallam) will intercede.
The scales will be raised and all good and bad deeds will be weighed and accounted for. A few people will enter paradise without reckoning.
"And the measuring out that day will be just; then as for those whose measure of good deeds is heavy, they shall be successful. And as for those whose measure of good deeds is light, those it is that have made their souls suffer loss."
The pious people will be given their book of deeds in their right hands while the sinners will be given in their left hands.
"And the book (of deeds) shall be put forward, then you will see the guilty fearing or account of what is in it, and they will say, "Ah! Woe to us! What a book this is! It does not leave out a small (deed) or a great one, but records them all." - Surah 18:49
Rasulullah (Sallallahu Alayhi Wasallam) will make his followers drink water from the Haud-e-Kauthar (the fountain of abundance). The water of this fountain will be whiter than milk and sweeter than honey.
Everyone will also have to cross the Sirat. Those who were pious, will cross it and enter paradise. Those who were sinners, will fall down into hell.
Hell has already been created.
"It (hell) is the fire kindled by Allah which rises over the hearts." (104:5-6)
"And verily, Hell is the promised abode of them all! To it are seven gates: for each of these gates is a special class for sinners." (15:43-44)
Jahim - intense heat produced by leaping flames of fire; Saqar - the excessive heat melting everything; Laza - sweeping flames of fire; Jahannam - deep pit; Hutama - that which crushes and grinds everything to powder; Sa'ir - blasting fire; and Hawiah - bottomless pit.
It has snakes, scorpions and many other types of punishments. Among the dwellers of hell, those that have even an iota of Imaan will be taken out of hell and admitted into paradise after having been punished for their evil deeds, and after the intercession of the prophets and pious servants of Allah. This is irrespective of how great sinners they may have been. As for the disbelievers and polytheists (Mushrikeen) they will abide therein forever and will not even die.
Paradise has also been created.
"This will be the garden or which you are made heirs for your good deeds in life. You shall have therein abundance of fruit, from which you shall have satisfaction." (43:72-74)
It has various types of comforts and luxuries. The dwellers of paradise will have no sort of fear or concern whatsoever. They will abide therein forever. They will not come out of it, nor will they die.
For more information please read this book: 'What Happens After Death' By Mufti Muhammad Aashiq Ilahi.