A geologist and archaeologist by training, a nerd by inclination - books, films, fossils, comics, rocks, games, folklore, and, generally, the rum and uncanny… Let’s have it!
Elsewhere:
As far as I can tell, you can do.
Obsidian has a huge number of plug-ins, that cover a wide range of uses. I also use Zettel Notes as a quick md file editor and that has the ability to capture pages in markdown to read later. And/or you can use Omnivore.
Counter-proposal: Perhaps use Obsidian instead?
I use Calibre.
It has a huge number of plugins - this is a list of the productivity ones. You’d need to do some reading to see if it has what you require.