Tails is great for privacy, but it's still a hot wallet. Hardware wallets are (in general) safer, unless you never go online with your Tails Electrum that holds your seed phrase. You can use a separate version of Tails that goes online, and has a watch-only wallet. But that's much more work.
So before doing this, you should decide what you want: Privacy? Safety? Both? Or a combination of both, depending on how much is in each wallet (a small hot wallet is convenient, a large cold wallet is safe).