While I love python, I feel like Java has more application for beginners. While I am a backend guy, Java is better right now for split front end backend sorts as you can build a client Nd server for an Android app in Java. This lets you learn front and backend without having to know two languages.

I say this knowing I hate a lot about Java, but thinking about how I would teach concepts and techniques while making a student employable and fostering the ability to experiment on their own.