If you manage to live a year most of the original violence will have passed. You will need to start to build a life where you can make and store foodstuffs to survive through seasons where food is more scarce (I live on 66°N, winter would be harsh). Hopefully you will be in a small band of survivors that are pooling strengths to get by and can learn farming all over again.
If you do survive this period then on a timescale of decades small camps of survivors will be able to connect and start to build back up again.