Whats the best programming language to learn that is used the most

This actually fluctuates, but the best way to find an answer is with charts like one Tiobe, Link: https://www.tiobe.com/tiobe-index/

It's always C/C++, Java, or Python.

Generally the one you REALLY should learn is java. Very useful and powerful. Python is good but not a language too learn until you learn a few others first (Unless you really like a challenge!).