I really love computer science, coding and mostly all the amazing things you can do with this knowledge, i feel i finally landed in my world.
I'm doing a Javascript course now and while it is really engaging to learn about how a language like that works and how to build with it, i'm getting quite tired and frustrated..
Now, i'd say i am quite meticulous when studying and i use some studying techniques to really integrate what i'm learning, but that means that 1h or even less lesson can take me all the time i have to study in a day to be understood, noted down and then repeated over the following days..
There are a lot of quite complicated concepts to understand and memorize, and, as i'm also working, sometimes it gets quite tiring.
I feel like there's this huge amount of never ending work and concepts before i can actually start do something cool with the knowledge i have, and i really want to start doing something cool.
I re-started to study after many years so i'd say it's also because of that if i'm not really used to it and i can't process much informations at the time.
How can you get better into gaining knowledge? how can you prevent getting fatigued?
I think you've answered your own question - be less meticulous. Oh, and memorise less.
A good programmer knows where their knowledge boundaries are. For example, if you're working in JavaScript, you probably don't need to know bit-shifting.
A good programmer doesn't know every feature; they know where to go to find that information. They know how to read the manual of an unfamiliar feature.
The most important thing you can do is do practical work. Build a website. Try new things. Look up how to implement something and then do it yourself. Find a project that interests you - like building your own website - that'll stave off the fatigue.
You don't need to memorise how to implement a linked-list - you need experience in building.
Good luck.