The biggest challenge would be to get out of the city and make the trip to my family’s farm safely. It would take about a week on foot/bikes using less known roads with all the supplies/weapons that would be crucial.
If I could get to the farm, rest would be fairly easy. I can farm, fish and and hunt. Heating works with wood. Fresh water is not a problem, nor is refrigeration with an ice cellar. My family has an old mill that we could restore to get flour and I think I could retrofit it to produce hydroelectricity in a year or so.
I’d trade access to electricity to get horses and other farm animals.
Almost every neighbour is related to me, so forming a defensive alliance should be possible.
I have the gear and the knowhow to make things work, it’s the not-getting-killed part at the start that’s hard.