What you guys think about the cold wallet method that came to my mind: Having two electrum wallets on same mobile one on the work space and one on the main space , one of them without any access to internet and disabling access to internet and one with internet access , the one without internet access having Bitcoin private keys and the one with internet access having master public key , using the offline wallet for signing transactions and using online wallet for broadcasting the transactions, what you all think about this method?

I think that's best option for me , when I don't wanna buy cold wallet and I don't have pc or laptop to use tails offline