Solidarity.

I would wear one.

My guess from the question an expectation of some formal group. Such groups exist. Better yet is prefiguration.

Build community in your neighborhood by getting to know your neighbors and contributing your skills to meet common goals. People, being social animals, work together to meet their needs. That is resistance.

Look out for your neighborhoods safety. Some ideas for doing that include: securing a water source, learning to raise food, learning basic repair of equipment, working on cardio, learning grappling/striking or joining a gun club. Be a neighbor with skills.

Lastly, never trust an organization with a heirarchy of leaders. Said leaders will eventually need to lynched. Joining the Marxist-Leninist book club is about as productive as Bible study.

I agree that colonizers have harmed indigenous people, but find the argument anyone has a birth right claim to property proposterous. As Proudhon proclaimed, “Property is theft!”. I expect any revolution toward anarchy to remove property from the owning class.

I am less knowledgable than you about “land back”. How does “land back” differ from other ethno nationalist movements like “blood and soil”?