How to survive societal collapse?

Any ideas on organizing for survival and civi/self defense? Classes for things like: using radio communication, flying drones, efficient off-grid systems etc. I hope to build 12x8 hibernation huts...heated with diesel air heater and small solar for 12/24vDC. Maybe make them modular so to expand and have higher ceiling, for multiple people. Anyone else thinking this way? And have strategic advice or ideas?