Well, when bitcoin was just started, I was hacking other peoples bitcoins. And Litecoins, ixcoins and i0coins.

To become hacker learning programming is not necessary. I do not know any programming languages, maybe except beginner level BASIC for some ancient machines. I am self learned system administrator. Learning about how system must be configured properly and securely is more important than how to write something in high-level language. Python is total garbage. Only programming with low level languages and learning machine code and manual memory management will help you find new exploits. For already existing exploits no programming is needed. Just find vulnerable or misconfigured system and take over control.

Learning about networking and understanding it by heart will help a lot.

Learning web scripting languages like PHP and HTML5 will help somewhat to hack large bitcoin exchanges. But I guess they are unhackable from web facing side. You must get access to software running underneath, like getting access to VPS control panel or exploiting operating system running the website. People spend a lot of time to properly code a web page and only to service the server using connection that is not secured against MITM attacks.

The Electrum wallet in Tails are outdated, so some exploit might be used to capture your seed. It is also not recommended to create the persistent volume, if you are prompted to do that.

Some early malware like BADUsb hides in the firmware of the USB drives, so it can be adapted to capture private keys and your Seed, if they wanted to. If you re-use the USB before you destroy it, then your Seed will be compromised.

These days you can buy a old second hand computer for the price of a USB drive, so I would much rather buy a old computer and printer <low specs> and print a bunch of paper wallets and destroy that.