Avoid being systematic or perfectionist with your notes while you in a class/lecture room. focus more with the lecturer, write only brief and short headlines in a raw format, maybe use an outline mode (check outliner plugin for that). Then later at home or in the college library grab a coffee and complete your research about the topic and expand on your notes with good structuring and formating.
Just start now. You’ll figure out your style of note-taking while doing it, you’ll waste your time trying to figure out a good system and structure to write notes.
Personally, I take my iPad with me and write my lecture notes using Good Notes and an Apple pencil. then I finish my reading/search and summarising the topic in Obsidian later when I’m back at home.
good luck.