Cold wallet electrum

Hi guys. Im creating a cold wallet using tails in a usb stick, and using electrum with ian coleman bip39.

The idea is to net get connected in internet with the tails usb stick with the wallet that I use to sign, just the watch only one.

So, my idea is to create a cold wallet using 2 usb sticks with tails, the first one will never connect to internet, the second one will be used in the same machine, but with internet to load the transactions.

My doubt is: the computer could not never be on internet after even when I changed the usb stick or use the normal boot with windows? Or could be offline just in the moment when I am using the usb stick with my seed?