I'll be the dick that suggests not using org mode for class notes; I typed up my lecture notes in it 4 years ago (for the class I teach) and there have been sev

I'll be the dick that suggests not using org mode for class notes; I typed up my lecture notes in it 4 years ago (for the class I teach) and there have been several backwards incompatible changes to org mode that required a few hours of debugging to get indenting, etc. to work correctly with my old files (yes, in a plain text outline). Now, these are huge files, so my use case is pushing it, but you'll want to be able to use and modify your lecture notes for years, so I'd suggest something lighter weight like a plain markdown file. Whatever you do, take care of version control and backup.