Improvements on generating monero wallets securely?

Question

My current process of generating monero wallets:

1. Use an air-gapped RaspberryPi

2. Use monero-wallet-cli to generate a wallet

3. Record mnemonic on paper only

4. Record partial address for reference on paper (e.g. 49egIz-----ee8ZX1)

5. Record full address/view-key in a computer txt file

For additional redundancy I am thinking of also encrypting the mnemonic/address/view-key:

openssl rand -base64 64 > password.txt

echo "exit" | ./monero-wallet-cli --mnemonic-language=English --generate-new-wallet=mywallet --password-file password.txt | openssl enc -aes-256-cbc -a -out mywallet.txt.enc

The above creates and wallet and outputs the cli content directly to an encrypted file (openssl prompts/verifies a password).

... and to decrypt:

openssl enc -aes-256-cbc -d -a -in mywallet.txt.enc -out mywallet.txt

I'd like some feedback and suggestions for improvements, thank you.