Forward to the Past! The Merchant

The world was engulfed in a nuclear explosion, and I was with it. Ideally, I should have died, but suddenly I woke up… Where? It's dark in front of my eyes! I can't see anything. Oh – I can see! I'm in my own body.
I'm fourteen again, it's the early nineties. In the fridge – "Rama" margarine and soup made from gray pasta, on the TV – "Santa Barbara", my sister is about to take a slippery path, my mother has been laid off from her job, and my father, who is now eight years younger than my current self, has started another family.
It would seem that you know the key turns of history – act! Develop! Yeah, right! Try to do something when you don't even have a passport and no one takes you seriously!
And it also turned out that in this changing reality, voids are created, which are filled in ways that I don't want at all..