Are you saying that you can't scale code because it's in Python? And JavaScript would solve the problem?

You can scale Python apps just fine (though obviously it depends a lot on the problem as how you go about that)

Would suggest way better resources found in /r/learnpython

I believe there is the 3.x variant available [0]

[0] https://www.codecademy.com/learn/learn-python-3

I actually learnt programming 7 years ago with the codecademy Python class after a career in marketing. I'm now a confirmed Data Engineer. I feel blessed.