C++ is a powerful general-purpose programming language. It can be used to develop operating systems, browsers, games, and so on. C++ supports different ways of programming like procedural, object-oriented, functional, and so on. This makes C++ powerful as well as flexible.
C++ is an intermediate-level language; learning this language will give you a much deeper understanding of programming structure. In C++, you have to write, declare, and explain everything in the source code, giving you a deeper knowledge of all the program parts. Also, the syntax of C, C++, and Java are almost the same, so learning Java and C after C++ will be very easy.
Other languages like Python are much easier to understand because they are almost syntax-free. You don't have to specify everything while writing its code, which makes the programming part easy, but you don't get the opportunity to learn the logic structure of the program like C++. Once you have learned the C++ language, then other languages will be easy for you to learn, as your foundation becomes strong.