[unethical_ban]

From a professional perspective, what do you want to work on?

Web technologies? CI/CD, IT automation, etc.?

Or something more like operating systems, robotics, hardware, drivers?

Or do you want to self-educate for the sake of it, to learn different paradigms and be a better programmer in general? (Everyone wants to do this, but not everyone has the time).

Golang and Python are incredibly popular in the automation/"glue code" space.

Java is popular in enterprise development (think banks).

Systems languages are popular if you're developing... systems.