This brings me back about 8 years when I was learning similar things in the wake of the dot com crash. I will go ahead and say that further learning of language

This brings me back about 8 years when I was learning similar things in the wake of the dot com crash. I will go ahead and say that further learning of languages and whatnot at your age is not necessary. If it's fun, go for it. But being well rounded by exposing yourself to things outside of technology will help flex your idea muscle (brain). Steeping yourself in tech is not the best way to come up with ideas. When I want ideas, I walk around and pay attention to how the people around me use technology and how they could better use it. Just chatting with people will help greatly. Soft skills will help you in life just as much as hard skills. Attempting to learn the sum of a college education from 15-18 is going to be harder than with the help of profs/TAs, you will miss things, and you may find yourself bored once in college (I did). So unless your goal is to be the obnoxious kid in the front row who knows all the material already, or if your goal is to do undergrad research (a better one), I wouldn't worry so much. Once something cool does hit you, you'll find building it easier and more fun than any work or learning exercise.