mostly no rules

On most servers in this format, yes. You should assume anything you build can be found, raided, or destroyed, and that staff will not roll it back. The usual exceptions are actions that threaten server stability or cross into out-of-game harm.

Typically the non-negotiables: no crashing or intentionally lagging the server, no doxxing, and limits on extreme chat behavior depending on the host. Everything else tends to be handled by players, for better or worse.

Stop thinking in terms of one base and one set of gear. Keep multiple stashes, spread valuables, use the Nether to move, and avoid tying your main storage to obvious travel lines. Information matters more than armor: protect your coords and be careful who you let near your builds.

Anarchy usually implies close to zero moderation. Mostly no rules often still has a short list of enforced lines, especially around server stability and out-of-game abuse. The day-to-day gameplay feels similar, but the ceiling on what gets punished is a bit lower.

Yes, if you can handle losing progress. The early goal is simple: get away from common routes, secure food and tools, and establish a hidden stash before you start building anything you would miss. Most players die because they announce themselves through obvious bases, public chat, or predictable travel.