Depends on what you want to do.
Write simple scripts with low barrier to entry? Python
Make websites? I'd say learn typescript, javascript, node
Work on Bitcoin core? Start with learning C and add C++ and Python
Work on LND, learn Golang
I've worked with over 2 dozen programming languages and things shift over time. My current favorite to recommended for beginner programmers is Python. It allows for simple scripts, to more structured and OOP style, and has easy to use libraries and frameworks to use for very basic AI/ML, graphic manipulation, 2d games, websites and seevices