Solid.
I would advice:
  • Send a small amount of BTC to your wallet and send it out again safely using your Tails offline to sign a PSBT. That way, you gain confidence for when the time comes to move your stash.
  • Consider making additional copies of your seed phrase. Having only one copy makes it very easy to protect from adversaries, but it also makes it very easy to lock yourself out by mistake.
  • More advanced, but would make a perfect setup: run your own node and point your watch-only wallet to it. That way, nobody else will know what addresses are you looking into, or that you are looking at any as a matter of fact.
I'm sure the community will bring even more ideas, but be proud. You're already on the right track.
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