What language to learn at 2021?

Is this your question too? 

My answer is python because it is widely used in all areas like Web development, Game Development, Computer vision, Robotics, GUI development, Embedded Applications, Machine learning, Data Science, Data Analysis, DevOps Tools, Scripting, Artificial Intelligence, etc., 

Excluding mobile development, it is popularly used everywhere else. 

Why learn Python?

• It is a scripting language. 
• It is object-oriented, imperative, function programming, and procedural styles. 
• it is easy to learn so highly educational. 
• It has a lot of libraries, and it is scalable, powerful, and high-productivity. 
• It is also a Glue language which means it acts as an interactive front-end for C & C++.

Click here to learn the short story about Python.

Why wait? Just pick on some free courses on the internet and go for it.  My suggestion would be Programming Knowledge channel on Youtube.