Taking notes by hand is probably often a good idea. But you can still afterwards make them very clean in a document, also thinking about them again while doing that, so there is also a bit of additional learning in that activity.
Also, I do use LaTeX (and derivatives) in almost in any case when I need to compose some document - it really helps to automatize many trivial things that were tiresome to do in MSO Word. However I know at least few people who tried LaTeX and just told me "Yuck!". I tried to recognize what is unique selling point, and all of those people told me it lacked the WYSIWYG mode and that they do not want to learn some language, so also ignore the LaTeX meta-code [0]. I feel I can't objectively say how steep learning curve is, because I just got used to declarative paradigm. LaTeX is not perfect, but I guess my requirements were different than my friends had, but I can't find an answer what really makes Word better than let's say LaTeX, LibreOffice/OpenOffice or other software in the same category? What leads us to decision to use Word not other software to let's say write thesis in it?
[0] As copperx mentioned, there is already LyX but it is far from being popular application.
edit: here it is http://blog.adnanmasood.com/wp-content/uploads/2012/07/mikte...