Thank you all.
I agree with everyone who said that a good system is just the act of writing down by hand, and how it helps you comprehend, verbalize, and interiorize. I have done this up until now, and it works for me, and as most said I also never had to/could re-read these kind of notes.
That being said, I want to mention My objective - something I left out of the original question, and as @gdubs reminded me, is quite important.
Although taking the kind of notes i mentioned above worked, this semester I want to attempt writing notes that if shared could theoretically help colleagues of mine out. I want to develop a note taking system that I could maintain for a semester, very honestly, because I want to experiment a radically different approach from what I've been doing until now, mostly for the sake of experimentation.
What most resonated with me from what I read, what I've concluded meanwhile, and i'm going to attempt the next months is - Reviewing my notes everyday, and possibly writing a "conclusion/summary" - Using pen and paper during classes, and transcribing to the computer after college - Create my own system - (I really enjoyed reading about Niklas Luhmann's System) - Sticking to this system for some time
And then i'll probably publish the workflow I ended up developing, along with the ideas i currently have on this turned into an actual project.
Thanks again. ~romes