this does require quite some expertise. as u noted sending can be triangulated. Also because this sending issue, it wouldnt really be an internet since only few parties would have the resources for mobile or ship-based transmitting systems that are harder to pin down or stop
If things get that bad, you make friends in an “unfriendly” country and have them beam in news and resources to you, which you distribute by sneakernet (or even paper). At that point you’re squarely in the territory of latent revolution, as sitting at home is no guarantee that the secret police won’t come for you anyways.