Sorry for your loss. I lost a friend to breast cancer and I wish there will be cure for it. It is really horrible disease.
Nobody knows what happens to us when we die. Certainly, our physical bodies will decay and dissolve in the nature. Billions of people went through our planet; lived here; had their hopes, dreams; like everyone experienced joy, love, and pain; and passed in the river of time. Billions of more will do the same, including you and me. Nobody ever came back from the death. Nobody who would share his or her story after their death.
Jews do not have unified opinion on the death and afterlife. OT does not really says much. Midrash adds: " When Moses realized that the decree [of death] had been sealed against him, he drew a small circle around himself, stood in it, and said, “Master of the universe, I will not budge from here until You void that decree.” At the same time, he donned sackcloth–indeed, wrapped himself in it–strewed ashes upon himself, and persisted in prayer and supplications before the Holy One, until heaven and earth–indeed, all things made during the six days of creation–were shaken…What did the Holy One do then? He had it proclaimed at every gate of every firmament that Moses’ prayer be not accepted nor brought up to His presence, because the decree concerning him had been sealed. " Moses weny the way of all humans, all earthlings, and died. Moses did not get any bargain about afterlife, resurrection, or access into heaven.
I would like to believe that there is afterlife, a universe where deceased are there, not tied to time and space of our world. Place where I could meet with dad, friends, romans, medieval crusaders, etc. But I had accepted that only certainity I have is this world, this time. My love ones live in my memories. I do not believe in earthly resurrection, because our planet has finitive resources and is dying. So is our Sun and galaxy. In two billions of years, Earth will be desert as red giant Sun evaporates all these oceans. Later our sun will run out of fuel and will die. Our galaxy is on colliosion course with other and in billions years all the stars we see will die.
Enjoy your life while on earth, use your skills, get plenty of education and use it to your full potential. This is the only certainity you have.