Heyllo dear game developers!

I am learning programming languages (such as HTML5 [not a real programming language, just mentioning]; CSS [same…]; JavaScript; Python; C; C++ right now) for a fairly long time and my dream is to develop a game. I was looking for where to start in the internet but I couldn't find anything that was really helpful. My dream would be to 100% program the game, no game engines, nothing what I would need except a solid programming language. Is that even possible? If yes in which programming language(s?)? Where should I start? What programming language should I choose to focus on 100% of my time? Thanks for your answers!
GaBeKool

After you have mastered all those languages you're presently studying, you will be better prepared to try to build a game from scratch without benefit of an engine, but you will have to learn all the things that go into a game. It's recommended to use an existing engine when starting out.

Anyhow, you should read our Start Here page: https://www.gamedev.net/start/​

My dream would be to 100% program the game, no game engines, nothing what I would need except a solid programming language.

Inventing the wheel takes time. I don't like engines myself, but obviously they serve their purpose.
JavaScript (TypeScript) can be used without any engine, or even library. You get ‘sprites’, sound, etc.
If you're willing to use a library/framework, you open a world of possibilities.
JavaScript/Typescript with Phaser,
Haxe with OpenFL,
C++ with SDL/SFML,
Java with LWJGL,

etc, etc.

Going along with the other comments, I agree that it is very suitable to make a game with the help of a engine/library, mainly for helping on graphics rendering, and if you will need realistic physics in your game, a physics library can help a lot. This way you can focus all of your creativity on what really matters on your game, on what will differ it from other games.