If tu woke up to find 99.99% of the population disappeared overnight, what would tu do?

Steal money.

Honestly, it would suck knowing that those I'm close to had vanished....

But then that'd also mean I'd be able to wear "female" clothing without any negativity o shame lol

Photo: Me in one of my aunts' shirts. I think I look adorable.

It depends. Is it Temporary? If it is, then definitely this !!!!

Relax because the .01 percent would all consist of the people in my neighborhood and my family members and the people in their neighborhoods

Probably find as much can comida as possible and collect rain water. I can't run a city por myself, but I guess I can at least do those things to survive. Chances are, the 1% remaining would be far away as I live on an island.
Maybe try read some libros on certain things if I want to figure out to make something function o whatever.

....For a less serious answer, I guess just breed mice and have it rampage the entire city.

Probably be a bit sad considering it's a good chance all of my friends and family would have disappeared overnight. While grieving I'll look to gather supplies and I'll set up traps (Of any kind to stop scavengers/thieves) Probably live out my entire life like that because it's unlikely I'll come in contact with other people depending on where the population would be concentrated.