That's it, the answers above are all correct. Let's put them briefly:
- There is nothing 100% safe (your bank account isn't neither
), but a hardware wallet is probably the safest way to store your cryptos.
- Your ledger will create and contain your keys, and they will remain only there, so they will very hardly get compromised as they aren't created nor stored in your computer.
- To operate, you will need to connect the device to a wallet (Live, Electrum...). I'm not really sure as I have never tried it but I think of having heard ever that there is some way to spend the coins offline. Anyway, this is some curiosity/advanced technical topic, not useful for you right now.
- One more thing that I think it is important to remember: update the firmware from time to time, because if you don't do it for years, you may have some difficulties in order to make your device work again.
You are very welcome to this space crypto.curious. I hope you have a wonderful time here, learning and hopefully earning too.