OP describes exactly how he abstracts away the mechanical task of writing LaTeX and can focus on the content. I did a similar thing in my classes and after a li

OP describes exactly how he abstracts away the mechanical task of writing LaTeX and can focus on the content. I did a similar thing in my classes and after a little bit of practice and tool adjustment you just don't think about LaTeX more than you think what pen to use or how to highlight something when handwriting. And precisely because math is so content-dense, having your notes is important, as they will be organized in a similar way to how the content is organized in your mind. Yeah, there is a lot of study material but most of the time, unless the class follows a textbook literally, you'll want your own set of notes with only the class contents, and you'll want to organize that in a way that is easy for you to understand.