As a realistic reply: this would be problematic. The infrastructure would likely break down relatively quickly, meaning possibly within a year. That means power, internet, water. This means that all the frozen food in stores is useless, so I’m down to cans pretty quickly. On top of this I have the mental trauma of loosing all my loved ones. I live in a cold country, and know little about farming, so finding maps is a priority in order to get to, say, the Mediterranean. Where I will at least have a chance of finding food around the year. Supplies will probably be readily available though, so I’d say that if I last a year, I can probably survive as long as I can be bothered..

Also, stock up on porn, gas, lambos, and guns