Learning a new programming language easy?

If you already know how to handle an existing "easy" programming language? i.e. Python or JavaSript. Will it be difficult to learn other programming languages like C++ or Java?

Learning a programming language is not hard, especially when there's a wealth of documentation out there. You'll be fine.

I've always wanted to learn a programming language but I don't really know how to approach it. Is there anyone good in the field that can recommend the right approach into programming.

Remember there's a big jump between learning a particular programming language (which is really just a 'programming tool') and learning the deeper mindset of computational thinking, which is a set of problem-solving skills about being able to think algorithmically, and use a programming language to solve problems.

If you're confident enough using Python or JavaScript to solve complex programming problems, then the computational thinking skills you'll have picked up from practicing in Python will also apply to any other general-purpose programming language like Java or C++. Many of the core building-blocks you'll know from Python are common to all the mainstream languaes, like variables, boolean expressions, strings, functions/subroutines, if/else, for, while, arrays/lists, etc. Even if the syntax or teminology is slightly different, the core concepts will be the same, and you can get a long way by searching Google (and especially StackOverflow) for examples of how to do a particular thing with another programming language's syntax.

For the most part, switching to a new language involves a few things:
- Getting used to new/different keywords and syntax differences.
- Using a new editor/tool with its own UI and shortcuts
- Different libraries which may work in different ways to those in the language you're used to - for example, converting between strings and numbers in might feel quite different between Python and Java.
- Also getting used to the fact that some programming language features and libraries you've come to rely on will not exist, but there'll be new/different alternatives for solving the same problem. (e.g. converting between string-to-number, or user input handling)
- Paradigm differences - some languages lean more heavily on certain paradigms than others; for example, Java is very much an "OO" language, and that will shine through compared with Python which doesn't really put "OO" at the heart of its philosophy in the same way.

Lastl, there's learning new "idioms" and the 'preferred' style of doing things for that language -- i.e. forcing yourself to not try writing Python-style-code in Java, or Java-style-code in Python. etc. While core programming concepts are common to all programming languages, every programming language has language features which causes its usage to evolve in slightly different directions, so there'll always be "cool tricks" and "patterns" and "gotchas" which apply to one language but not to others.