>>12901089javascript is in high demand. It is the language for web programming, used these days for both client side and server side
python is another high demand language. Used for general purpose across most all industries as well as being a common choice for machine learning
large applications and high performance software are still written and maintained in enterprise languages like c++, c#, java. Games and graphics software jobs will usually be c++ or c#
pay depends more on what you are working on and what your skills and experience are. The high demand areas are 1. web dev, 2. app dev 3. scalable, concurrent application software, 4. machine learning and data science
once you learn one language well, learning others becomes much easier. I would second
>>12901138 and recommend starting with python. It's a modern language with generally good demand and application across all industries, easiest to learn, efficient and modern syntax for the programmer
