Could you elaborate on the steps involved in staking Azero using a Ledger hardware wallet? I'm interested in understanding the process in detail, from connecting the Ledger device to the necessary platform, to delegating my coins for staking, and any potential risks or considerations I should be aware of. Additionally, is there a specific Ledger app required for Azero staking, and what are the minimum staking requirements or rewards structure? It would be great to have a comprehensive overview of the staking process using a Ledger wallet.