Best shorthand for taking notes in class

I prefer taking notes on paper rather than typing them on my laptop. I know how to write in cursive, but it’s just a little too slow, when I’m sitting in a lecture that is progressing rapidly. I’ve been trying to find a simple shorthand style/system(?), but I can’t really figure out which one would work the best for taking notes? I‘d like one that’s kinda flowy, yet still distinct enough that I don’t mix up the letters too bad.

I’d like to note that I am Danish (I apologise for any linguistic errors I’ve made), so it’d be nice, if the font is somewhat easy to add your own symbols to (æøå).