Cool, your use case is exactly one I hope it works for. I find that the notebooks are a really good way to organize by topic or project, and should work really well for classes, too. You can even archive a project or class notebook when it ends and still easily access, revive, or drop into the content.
Tagging in `nb` is really simple and is just a matter of putting hashtags in your documents and then searching for those hashtags using `nb search` / `nb q`. `nb <url>` makes tagging a little more convenient when bookmarking by providing a `-t <tag1>,<tag2>...` / `--tags <tag1>,<tag2>...` option and saving them in a dedicated `## Tags` section in `.bookmark.md` documents.
Tagging in `nb` is really simple and is just a matter of putting hashtags in your documents and then searching for those hashtags using `nb search` / `nb q`. `nb <url>` makes tagging a little more convenient when bookmarking by providing a `-t <tag1>,<tag2>...` / `--tags <tag1>,<tag2>...` option and saving them in a dedicated `## Tags` section in `.bookmark.md` documents.