Electrum transactions

So I have a large amount of btc stored on a paper wallet. Let’s say I want to spend some or all the bitcoin. I imported the private keys on an offline machine, set up watch-only wallet on online machine. To initiate a transaction, I use the online wallet to write the transaction, qr read the transaction on my offline wallet, sign it and broadcast it using the online wallet. I have two questions.

1) Is my setup “safe”? 2) I take pictures of both signed and unsigned transaction qr codes, is a signed transaction vulnerable to hacks?

Thanks!