I don't think preserving the internet in the environment a tyrannical/dictatorial/censorial government is a viable idea. We have real world examples such as Cuba and North Korea, those people tend to pass around soap opera episodes on thumb drives. They're not interested in much else.
I hope-plan to live in the boonies, my nearest neighbor visible through binoculars. If I won a lottery jackpot, I'd even spend a few hundred thousand to bring in a fiber optic cable off the nearest trunk, my more realistic plan is Starlink. I can't share anything with anyone trusted (they don't live close). I can't use packet radio to set up something ad hoc (fixed locations are easy to trace). If I lived in the suburbs, it's no better... my neighbors are all jackasses, tards, and snitches. Even if I could dig a few copper ethernet cables under the ground to houses within 100M, none of those people are interested except for the professional informants.