You've created your cold wallet, put the small balance first, no matter what your purchasing power, put in 50 reais (US$ 8,86) of bitcoin and make the airgap move and make the fris move from the balance at address 1 to address 2 or 3 or to another address in your wallet, do it because if you don't know how to make the airgap move everything correctly, if you need to or if you don't write down the 12 words or 24 words+passphrase correctly, you'll lose everything and you'll have to test before testing.
What's next? How do I airgap? How am I going to do everything right? Can you airgap Tails?
