[ivthreadp110]

Python backend is easy to learn. JS for front end is critical. For JavaScript, make your life easier- start at ES6.

For Python for backend start super simple for small projects. Bottle.py or CherryPy.

Templating is a thing of the past, use Angular or ReactJS for front end development and use async calls for all data loads.

That's what I'd suggest. Python is easy to learn, start with simple things like bottle.py to to make a simple restful service. JavaScript can be a mess if done wrong, but ES6 is a game changer. I like both Angular and React, I find Angular 1.x super easy to use and learn but never use it in produciton.

If you're starting out, that's a quick dev cycle and easy to learn.