Locked Where do I learn to hack?

[NonSensical]

Hello.

I am a newcomer in the hacking branch of computer science. I know a bit of coding, such as C++ and JavaScript. But I want to expand my knowledge now. Mostly inspired by my Cousin who does ethical hacking for a living. I wish to learn more about hacking, ethical or unethical (hope it doesn't go into unethical), so I can at least connect with/understand my cousin whenever he goes on rambles about coding/hacking at Christmas dinner. 

Where can I learn hacking in my free time? Thinking about doing this as a hobby. I also wish to learn hacking for free, I would like to know any forums or websites I can learn from. 

[mon]

You must spend much time with hacking forums.