security – How to transfer bitcoin? No third party, no exchange, no hard wallet, no mobile wallet

I have two paper wallets and want to transfer 10 bitcoins between them.
I do not want to use any other 3rd party software or hard wallet (because its created by individuals, so they can access my data if they try hard enough.) and no exchanges (same reason.)
Once I enter my private key anywhere but receiver side, it gets stolen. So naturally I have a question, HOW if regardless of the way, someone is involved? Please correct me if I miss something. Thank you and have a great year ahead!