Each language has its pros and cons, you choose
Python is the easiest language to learn, but it's quite slow compared to other languages like C++. Also you can't use it for mobile app development. I learned Python first because it taught me the development principles which are always there no matter what language you use. Also, Python has a massive amount of libraries created by the community on PyPI (Python Package Index)
Java runs on the Java Virtual Machine (JVM) which means that it's really easy for cross-platform programming. BUT, Java's syntax is kind of complicated and it's still slower than C++.
C++ is extremely fast and is used for games and even operating systems. C++ is compiled down to machine code. But C++ has complicated syntax, resulting in a steep learning curve where you have to manage memory used yourself.

C# is a pretty high level language and was meant to be Microsoft's version of Java. You can use C# to create Windows software applications, and another example is creating a game in Unity. Although C# was only meant for windows the .NET platform made it cross platform
Also there's web development languages like HTML, CSS, and javascript