people started working on this in the 1960s though most failed there were major lessons to be learned about it. It is very much the time to start building parallel institutions. the transition towns movement the FEC and FIC federation of communes people have been haphazardly lurching towards these things . worker owned and co-ops of the past and even lodge societies like the oddfellows have built humanistic social instituions that have been mostly ignored by mainstream society.
Im working on things with some other people right now. what country are you in ? how old and do you have any skills?
1/3 the yield of current modern wheat is already at the level of preindustrial wheat yields so as a post apocalyptic crop this creates a beneficial artifact from the modern era.