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I'm not sure what your goal is, but if you just want to learn coding (logic, arrays, etc) without having to have knowledge of a billion libraries, I would do JavaScript. Can do it right in browser, it is not a strongly typed language. Once you know how to program in one language (LISP etc are obvious exceptions) to work in other languages all you need to do is learn the workflow. JavaScript has no barrier and you can start with the meat and potatoes right off the bat, where as C++, Java, C# are compiled and have a large barrier to entry.
With the popularity of NodeJS, you can easily make server/client apps, web pages, console apps all in JavaScript.