We never really needed it, it arose naturally when people began to question the nature of their reality and other people realized they can gain political power by giving them “answers”.

Work on your own projects and it will come naturally, it’s the best way to thoroughly learn a language (probably JS in your case). Try to really understand the basics (like OOP), it’s knowledge which will both translate to other languages and help you learn frameworks/libraries. Instead of relying solely on tutorials, try reading the documentation, it will give you a more thorough understanding (if it’s good), also stack overflow isn’t cheating, you can’t always remember everything. Trust me, you are already way ahead of others if you plan to take CS.

Why do you think renewables are better for the environment? Nuclear is very clean and produces next to no emissions. In comparison, solar panels have a production process which produces considerable emissions, once they fail (which is in around 25 - 30 yrs), they basically turn into toxic waste. Similar goes for wind turbines, but they also totally ruin the landscape, since roads have to be built in order to access and maintain them. Additionally they’re not viable everywhere and look ugly af.